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Building Materials MCQ Questions & Answers

Building Materials MCQs : This section focuses on the "Building Materials". These Multiple Choice Questions (MCQs) should be practiced to improve the Building Materials skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

The slag which floats on the surface of the molten iron generally contains

A. Lime (CaO) 45%
B. Silica (SiO2) 35%
C. Alumina (Al2O3) 12% and MgO, CaSO4, KMnO2 and FeO 8%
D. All the above

View Answer

Question 2

Priming consists of

A. One part of white lead, 8 parts of chalk and four parts of twice boiled linseed oil
B. 8 parts of white lead, one part of chalk and four parts of twice boiled linseed oil
C. One part of white lead, 8 parts of chalk and one part of linseed oil
D. None to these

View Answer

Question 3

According to ISI, bitumen is classified into

A. 2 grades
B. 4 grades
C. 8 grades
D. 10 grades

View Answer

Question 4

Stones used for the construction of retaining walls must be

A. Soft
B. Hard
C. Light
D. Heavy

View Answer

Question 5

Wrought iron is manufactured from pig iron by

A. Refining
B. Pudding
C. Shingling
D. All the above

View Answer

Question 6

The portion of a brick cut to form angles other than right angles in plan, is known as

A. Queen closer
B. King closer
C. Closer
D. Squint brick

View Answer

Question 7

Expansion Joints in masonry walls are provided in wall lengths usater than

A. 10 m
B. 20 m
C. 30 m
D. 40 m

View Answer

Question 8

Pick up the correct statement from the following:

A. In stone arches, the stones are placed with their natural beds radial
B. In cornices, the stones are placed with their natural beds as vertical
C. In stone walls, the stones are placed with their natural beds as horizontal
D. All the above

View Answer

Question 9

Pick up the correct statement from the following:

A. The plywoods do not split or crack due to changes in atmosphere
B. The commercial plywoods are available upto 150 cm wide and upto 300 cm long
C. The plywoods possess uniform tensile strength in all directions
D. All the above

View Answer

Question 10

Pick up correct statement from the following:

A. Fibre boards are used for thermal and acoustic control
B. Fibre boards are used for light weight standing members
C. Fibre boards are obtained by impregnating a resin product on fibres
D. All the above

View Answer

Question 11

Water paint is a

A. White wash
B. Color wash
C. Whiting
D. All the above

View Answer

Question 12

Pick up the correct statement from the following:

A. Slaked lime contains calcium hydroxide
B. Quick lime contains calcium oxide
C. Slaked lime may be obtained from quick lime
D. All the above

View Answer

Question 13

Pick up the correct statement from the following:

A. The average crushing strength of hand moulded bricks is 6000 t/m2
B. The average tensile strength of hand moulded brick is 200 t/m2
C. The average shearing strength of hand moulded brick is 600 t/m2
D. All the above

View Answer

Question 14

The coefficient of hardness of stones used in road work should be greater than

A. 10
B. 12
C. 15
D. 17

View Answer

Question 15

A pug mill is used for

A. Softening brick earth
B. Moulding brick earth
C. Tempering brick earth
D. Providing brick earth

View Answer

Question 16

Ultimate strength to cement is provided by

A. Tricalcium silicate
B. Di-calcium silicate
C. Tri-calcium aluminate
D. Tetra calcium alumino ferrite.

View Answer

Question 17

The stretcher bond in brick masonry can be used only when the thickness of wall is

A. 90 mm
B. 180 mm
C. 190 mm
D. 280 mm

View Answer

Question 18

The curved swellings from the growth of layers or wounds left after branches are cut off in an irregular manner are known as

A. Knots
B. Rindgalls
C. Burls
D. None of these

View Answer

Question 19

Steel contains carbon approximately

A. 1.50% to 5.6%
B. 0.05% to 1.75%
C. 0.25 %
D. None to these

View Answer

Question 20

A ferrous metal is

A. Cast iron
B. Wrought iron
C. Steel
D. All the above

View Answer

Question 21

The rocks having alumina or clay as their major constituents are known as

A. Siliceous rocks
B. Argillaceous rocks
C. Calcareous rocks
D. Sedimentary rocks

View Answer

Question 22

Paints with white lead base are suitable for painting of

A. Wood work
B. Iron work
C. Both wood work and iron work
D. None of the above

View Answer

Question 23

Pick up the correct statement from the following:

A. The lime in excess makes the cement unsound and causes the cement to expand and disintegrate
B. The silica in excess makes the cement stronger but its setting time also increases
C. The excess amount of alumina weakens the cement
D. All the above

View Answer

Question 24

Plywood is made from

A. Common timber
B. Bamboo fibre
C. Teak wood only
D. Asbestos sheets

View Answer

Question 25

If the iron ore contains clay as an impurity, the flux added during calcination, is

A. Clay
B. Lime stone
C. Argillaceous iron ore
D. All the above

View Answer

Question 26

The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively:

A. 15, 75, 10
B. 75, 10, 15
C. 10, 15, 75
D. 10, 75, 15

View Answer

Question 27

Three basic raw materials which are needed in large quantities for production of steel are

A. Iron ore, coal and sulphur
B. Iron ore, carbon and sulphur
C. Iron ore, coal and lime stone
D. Iron ore, carbon and lime stone

View Answer

Question 28

Stucco paints are suitable for

A. Stone masonry
B. Brick walls
C. Both (A) and (B)
D. Neither (A) nor (B)

View Answer

Question 29

The cracks caused by shrinkage of the exterior surface of the wood exposed to atmosphere, are called:

A. Radial shakes
B. Heart shakes
C. Wind cracks
D. Twisted fibres

View Answer

Question 30

Pick up the correct statement from the following:

A. The theory of formation of concrete is based on the phenomena of formation of voids
B. The bulking of sand is taken into account while volumetric proportioning of the aggregates
C. The dry sand and the sand completely flooded with water, have practically the same volume
D. All the above

View Answer

Question 31

Stainless steel resists corrosion due to

A. Carbon
B. Sulphur
C. Vanadium
D. Chromium

View Answer

Question 32

In a mortar, the binding material is

A. cement
B. sand
C. surkhi
D. cinder.

View Answer

Question 33

A 1st class brick immersed in water for 24 hours, should not absorb water (by weight) more than

A. 10 %
B. 15 %
C. 20 %
D. 25 %

View Answer

Question 34

Pick up the constituent of good brick earth whose excess causes the raw bricks shrink and warp during drying and burning, from the following:

A. Alumina
B. Lime
C. Iron-oxide
D. Magnesia

View Answer

Question 35

To retard the initial setting time of cement, the compound responsible, is

A. Tri-calcium silicate
B. Gypsum
C. Di-calcium silicate
D. Tri-calcium aluminate

View Answer

Question 36

Which one of the following is used for preparing porcelain?

A. Clay
B. Feldspar
C. Quartz
D. All of these

View Answer

Question 37

Bitumen felt is used for

A. Water proofing
B. Damp proofing
C. Both (A) and (B)
D. Neither (A) nor (B)

View Answer

Question 38

Wrought iron contains carbon upto

A. 0.25%
B. 1.00%
C. 1.50%
D. 2%.

View Answer

Question 39

The softest rock is

A. Marble
B. Diamond
C. Talc
D. Quartz

View Answer

Question 40

Pick up the correct statement from the following:

A. Corrugated sheet iron is made by passing plain sheets between grooved rollers
B. Strength and stiffness of corrugated sheets are considerably increased
C. Corrugated sheets are generally used on slanting roofs
D. All the above

View Answer

Question 41

Based on the following rocks and minerals, select the correct statement, quartz, shale, basalt, granite, marble, gypsum, mica

A. Basalt and marble are the only metamorphic rocks
B. There is no sedimentary rock
C. Granite is the only igneous rock
D. Quartz and mica are minerals

View Answer

Question 42

The weight of a good quality brick when immersed in water for a period of 16 hours should not exceed the weight of dry brick

A. 20 %
B. 15 %
C. 10 %
D. None of these

View Answer

Question 43

The variety of pig iron used for manufacture of wrought iron, is

A. Bessemer pig
B. Grey or foundry pig
C. White forge pig
D. Mottled pig.

View Answer

Question 44

The internal size of mould used in brick preparation is

A. Equal to the size of a fully burnt brick
B. Smaller than the size of a fully burnt brick
C. Greater than the size of a fully burnt brick
D. None of the above

View Answer

Question 45

The minimum compressive strength of 1st class bricks should be

A. 75 kg/cm²
B. 90 kg/cm²
C. 100 kg/cm²
D. 120 kg/cm²

View Answer

Question 46

In a mortar, the binding material is

A. Cement
B. Sand
C. Surkhi (brick-dust)
D. Cinder

View Answer

Question 47

Bitumen felt

A. is used as water proofing material
B. is used as damp proofing material
C. is made from bitumen and hessian fibres
D. all the above.

View Answer

Question 48

The base material for distemper, is

A. Chalk
B. Lime
C. Lime putty
D. Cement wash

View Answer

Question 49

A mortar joint in masonry which is normal to the face of wall is known as

A. Bed joint
B. Wall joint
C. Cross joint
D. Bonded joint

View Answer

Question 50

Rapid hardening cement attains early strength due to

A. Larger proportion of lime grounded finer than normal cement
B. Lesser proportion of lime grounded coarser than normal cement
C. Lesser proportion of lime grounded finer than normal cement
D. Excess percentage of gypsum

View Answer

Question 51

Gypsum is a

A. Mechanically formed sedimentary rock
B. Igneous rock
C. Chemically precipitated sedimentary rock
D. Metamorphic rock

View Answer

Question 52

According to IS specifications, the compressive strength of ordinary Portland cement after three days should not be less than

A. 7 MPa
B. 11.5 MPa
C. 16 MPa
D. 21 MPa

View Answer

Question 53

The moisture content in a well seasoned timber is

A. 4 % to 6 %
B. 10 % to 12 %
C. 15 % to 20 %
D. 100 %

View Answer

Question 54

Laterite is a/an

A. Volcanic rock
B. Argillaceous rock
C. Calcareous rock
D. Siliceous rock

View Answer

Question 55

Percentage content of silica in window glass, is

A. 40 to 45
B. 50 to 55
C. 60 to 65
D. 70 to 75

View Answer

Question 56

Pick up the correct statement from the following:

A. The distinct plane of division along which a stone can easily be split, is called natural bed of stone
B. The natural bed of sedimentary rocks is along the planes of stratification
C. The natural bed of igneous rocks is not defined
D. All the above

View Answer

Question 57

For making fly-ash building bricks, the following mix of fly-ash, sand and lime, is

A. 80 : 13 : 7
B. 70 : 20 : 10
C. 60 : 35 : 5
D. None of these

View Answer

Question 58

Pick up the correct statement from the following:

A. Catalysts are added to assist and accelerate the hardening of resin
B. The fillers are inert materials and they impart strength and hardness
C. Fibrous fillers increase thermal resistance
D. All the above

View Answer

Question 59

For melting one tonne of cast iron

A. 700 m3 air is required
B. 20 kg limestone is required
C. one quintal coke is required
D. all the above.

View Answer

Question 60

Bitumen in

A. solid state, is called asphalt
B. semi fluid state, is called mineral tar
C. fluid state, is called petroleum
D. all the above.

View Answer

Question 61

Plastic

A. Is an organic substance
B. Consists of natural or synthetic binders
C. Finished products are rigid and stable at normal temperature
D. All the above

View Answer

Question 62

The most important constituent of an oil paint, is

A. Thinner
B. Vehicle
C. Pigment
D. All the above

View Answer

Question 63

The main ingredients of Portland cement are

A. Lime and silica
B. Lime and alumina
C. Silica and alumina
D. Lime and iron

View Answer

Question 64

Mastic asphalt is generally used for

A. Damp proof course
B. Water proof layer
C. Partition walls
D. Both (A) and (B)

View Answer

Question 65

To give a brilliant finish, the type of varnish used, is

A. Water varnish
B. Spirit varnish
C. Turpentine varnish
D. Oil varnish

View Answer

Question 66

If the furnace is provided with insufficient fuel at low temperatures, the type of pig iron produced, is called

A. Bessemer pig
B. Grey or foundry pig
C. White or forge pig
D. Mottled pig.

View Answer

Question 67

A good quality stone absorbs water less than

A. 5 %
B. 10 %
C. 15 %
D. 25 %

View Answer

Question 68

Duco paints are

A. Plastic paints
B. Cellulose paints
C. Emulsion paints
D. Oil paints

View Answer

Question 69

Pick up the volcanic rock from the following:

A. Granite
B. Dolerite
C. Basalt
D. All the above

View Answer

Question 70

Percentage of carbon content in mild steel is

A. Less than 0.25
B. Between 0.25 and 0.7
C. Between 0.7 and 1.5
D. Greater than 1.5

View Answer

Question 71

The initial setting time of lime-pozzolana, is

A. 30 minutes
B. 60 minutes
C. 90 minutes
D. 120 minutes

View Answer

Question 72

A bull nose brick is not used for

A. Rounding off sharp corners
B. Pillars
C. Decoration purpose
D. Arches

View Answer

Question 73

The commonly used base for iron and steel work, is

A. Red lead
B. Zinc white
C. White lead
D. Titanium white

View Answer

Question 74

Name the type of cement from the following for canal linings:

A. Sulphate resisting cement
B. Rapid hardening cement
C. Quick setting cement
D. Pozzolana cement

View Answer

Question 75

Cast iron contains carbon approximately

A. 1.5% to 5.5%
B. 0.05% to 1.75%
C. 0.250 %
D. None to these

View Answer

Question 76

Strength of cement concrete primarily depends upon

A. Quality of water
B. Quantity of aggregate
C. Quantity of cement
D. Water-cement ratio

View Answer

Question 77

A first class brick when immersed in cold water for 24 hours should not absorb water more than

A. 15 %
B. 20 %
C. 22 %
D. 25 %

View Answer

Question 78

Proper amount of entrained air in concrete results in (i) Better workability (ii) Better resistance to freezing and thawing (iii) Lesser workability (iv) Less resistance to freezing and thawing

A. (i) and (ii)
B. (i) and (iv)
C. (ii) and (iii)
D. (iii) and (iv)

View Answer

Question 79

After storage, the strength of cement

A. Decreases
B. Increases
C. Remains same
D. May increase or decrease

View Answer

Question 80

Pick up the correct statement from the following:

A. Blisters in the finished wrought iron, are caused due to the reaction between oxide of iron and carbon
B. The edges of a finished wrought iron are rough due to red shortage
C. Pig iron (charcoal) is manufactured from magnetic ore (Fe3O4)
D. All the above

View Answer

Question 81

Initial setting time of cement for asbestos cement products should be not less than

A. 30 minutes
B. 50 minutes
C. 75 minutes
D. 90 minutes

View Answer

Question 82

The most durable varnish is

A. Water varnish
B. Spirit varnish
C. Turpentine varnish
D. Oil varnish

View Answer

Question 83

The plastics made from cellulose resin

A. are as clear as glass
B. are tough and strong
C. possess excellent electrical properties
D. All the above.

View Answer

Question 84

Glazing is used to make earthenware

A. hard
B. soft
C. porous
D. impervious

View Answer

Question 85

Specific gravity for most of the building stones lies between

A. 1.5 to 2.0
B. 2.0 to 2.5
C. 2.5 to 3.0
D. 3.0 to 3.5

View Answer

Question 86

The most common admixture which is used to accelerate the initial set of concrete is

A. Gypsum
B. Calcium chloride
C. Calcium carbonate
D. None of the above

View Answer

Question 87

Oil varnish generally consists of

A. Synthetic resin and spirit
B. Oil, wax and resin
C. Resin, oil and turpentine
D. Spirit, oil and wax

View Answer

Question 88

Which of the following bricks are used for lining of furnaces?

A. Over-burnt bricks
B. Under-burnt bricks
C. Refractory bricks
D. First class bricks

View Answer

Question 89

Brittleness of cold is due to an excess of

A. Sulphur
B. Carbon
C. Phosphorus
D. Silicon

View Answer

Question 90

The variety of pig iron used for the manufacture of steel by Bessemer process, is

A. Bessemer pig
B. Grey pig
C. White forge pig
D. Mottled pig

View Answer

Question 91

The minimum compressive strength of 2nd class bricks should be

A. 75 kg/cm²
B. 90 kg/cm²
C. 100 kg/cm²
D. 120 kg/cm²

View Answer

Question 92

Initial setting of cement is caused due to

A. Tri-calcium silicate
B. Di-calcium silicate
C. Tri-calcium aluminate
D. Tetra calcium alumino ferrite

View Answer

Question 93

The slenderness ratio for masonry walls should not be more than

A. 10
B. 20
C. 30
D. 40

View Answer

Question 94

Pick up the correct statement from the following:

A. Styrene resin is produced from ethylene which is made from petroleum
B. Styrene resin is light in weight
C. Styrene resin transmits ultraviolet waves of light
D. All the above

View Answer

Question 95

The term frog means

A. An apparatus to lift the stone
B. A depression on a face of brick
C. Vertical joint in a brick work
D. Soaking brick in water

View Answer

Question 96

For construction of structures under water, the type of lime used, is

A. Hydraulic lime
B. Fat lime
C. Quick lime
D. Pure lime

View Answer

Question 97

Sea sand used in structures causes

A. Dampness
B. Efflorescence
C. Disintegration
D. All of these

View Answer

Question 98

The commonly used lime in white washing, is

A. White lime
B. Fat lime
C. Hydraulic lime
D. Quick lime

View Answer

Question 99

Wrought iron contains carbon about

A. 1.5% to 5.5%
B. 0.5% to 1.75%
C. 0.1% to 0.25%
D. None to these

View Answer

Question 100

The basic purpose of a retarder in concrete is

A. To increase the initial setting time of cement paste in concrete
B. To decrease the initial setting time of cement paste in concrete
C. To render the concrete more water tight
D. To improve the workability of concrete mix

View Answer

Question 101

Due to attack of dry rot, the timber

A. Cracks
B. Shrinks
C. Reduces to powder
D. None of these

View Answer

Question 102

Pick up the correct statement from the following:

A. Melamine is obtained from calcium carbide
B. Formaldehyde is prepared synthetically from methane
C. The melamine when reacted with formaldehyde forms the melamine-formaldehyde resin
D. All the above

View Answer

Question 103

The variety of pig iron used for the manufacture of steel by Bessemer process, is

A. Bessemer pig
B. Grey pig
C. White forge pig
D. Mottled pig.

View Answer

Question 104

Invar contains

A. 12% of nickel
B. 24% of nickel
C. 30% of nickel
D. 36% of nickel

View Answer

Question 105

The main constituent of fly-ash, is

A. Aluminium oxide
B. Silica
C. Ferrous oxide
D. All of these

View Answer

Question 106

Seasoning of timber is essential to remove

A. Knots from timber
B. Sap from timber
C. Twisted fibre from timber
D. Roughness of timber

View Answer

Question 107

The rocks which are formed due to pouring of magma at the earth's surface are called

A. Plutonic rocks
B. Hypabyssal rocks
C. Volcanic rocks
D. Igneous rocks

View Answer

Question 108

Pick up the correct statement from the following:

A. Steel produced by open hearth process is milder than that obtained by the Bessemer process
B. Engineers prefer open hearth steel for structural purpose as it is more homogenous
C. Basic Bessemer process is suitable for converting poor ore containing a large proportion of sulphur and phosphorus into steel
D. All the above

View Answer

Question 109

Crushing strength of a good building stone should be more than

A. 50 MPa
B. 100 MPa
C. 150 MPa
D. 200 MPa

View Answer

Question 110

The plywood

A. Has good strength along the panel only
B. Can be spilt in the plane of the panel
C. Has greater impact resistance to blows than ordinary wood
D. Cannot be bent more easily than ordinary wood of same thickness

View Answer

Question 111

The rocks which are formed due to cooling of magma at a considerable depth from earth's surface are called

A. Plutonic rocks
B. Hypabyssal rocks
C. Volcanic rocks
D. Igneous rocks

View Answer

Question 112

Pick up the hypabyssal rock from the following:

A. Granite
B. Dolerite
C. Basalt
D. All the above

View Answer

Question 113

Quick lime is

A. Calcium carbonate
B. Calcium oxide
C. Calcium hydroxide
D. None of the above

View Answer

Question 114

Which of the following is the purest form of iron?

A. Cast iron
B. Wrought iron
C. Mild steel
D. High carbon steel

View Answer

Question 115

Seasoning of timber is done for

A. Increasing moisture content
B. Decreasing moisture content
C. Increasing strength of timber
D. None to these

View Answer

Question 116

Seasoning is

A. A process of removing sap
B. Creosoting
C. Painting with sodium silicate
D. Coating with tar

View Answer

Question 117

Blister steel

A. Is obtained by cementation process
B. Is full of fissures and cavities
C. Can be easily welded
D. All the above

View Answer

Question 118

Pick up the compound responsible for early strength of cement from the following:

A. Tetra-calcium alumino-ferrite
B. Tri-calcium silicate
C. Tri-calcium aluminate
D. Di-calcium silicate

View Answer

Question 119

Pick up the correct statement from the following:

A. Alexander Parkes, a Scottish chemist prepared a hard material by mixing camphor and alcohol with nitro cellulose and called it, as Parkesite
B. Dr. L. Bakeland, a Belgian scientist prepared a product known as Bakelite
C. Pollark, an Austrian scientist prepared a substance from urea and formaldehyde and called it Plastic
D. All the above

View Answer

Question 120

Quick lime (or caustic lime)

A. Is obtained by the calcination of pure lime stone
B. Has great affinity to moisture
C. Is amorphous
D. All the above

View Answer

Question 121

Snowcrete is one of the patent forms of

A. Distempers
B. Water proof cement paints
C. Enamel paints
D. Cellulose paints

View Answer

Question 122

The most commonly used base for timber painting, is

A. Red lead
B. Zinc white
C. White lead
D. Titanium white

View Answer

Question 123

Which of the following is a mineral?

A. Basalt
B. Granite
C. Quartz
D. Syenite

View Answer

Question 124

The rock generally used for roofing, is

A. Granite
B. Basalt
C. Slate
D. Pumice

View Answer

Question 125

The compound of Portland cement which reacts immediately with water and also sets first is

A. Tri-calcium silicate
B. Di-calcium silicate
C. Tri-calcium aluminate
D. Tetra calcium alumino ferrite

View Answer

Question 126

Glazing of clay products, is done

A. To improve their appearance
B. To protect them from atmospheric effect
C. To protect them from corrosive action
D. All the above

View Answer

Question 127

The rocks formed by gradual deposition, are called

A. sedimentary rocks
B. igneous rocks
C. metamorphic rocks
D. none of these.

View Answer

Question 128

Pick up the correct statement from the following:

A. Plastics have generally low melting point
B. The coefficient of thermal expansion of plastics is about three times than that of steel
C. The acoustical boards prepared by impregnating fibre-glass with phenolic resins has absorption coefficient of about 0.67
D. All the above

View Answer

Question 129

The thermosetting plastic

A. Becomes rigid when moulded at suitable pressure and temperature
B. At 127°C to 177°C permanently set and further application of heat does not soften it
C. Chars at 343°C
D. All the above

View Answer

Question 130

The process of mixing clay, water and other ingredients to make brick is known as

A. Kneading
B. Moulding
C. Pugging
D. Drying

View Answer

Question 131

Which of the following has more fire resisting characteristics?

A. Marble
B. Lime stone
C. Compact sand stone
D. Granite

View Answer

Question 132

Pick up the correct statement from the following:

A. Solder material is an alloy which melts at a temperature above 400°C
B. Brazing is done at temperature above 600°C to 1100°C
C. Brazing joint is stronger than the solder joint
D. All the above

View Answer

Question 133

Apiece of sawn timber whose cross-sectional dimensions exceed 5 cm, in one direction and 20 cm in the other direction, is called a

A. Cant
B. Deal
C. Baulk
D. Strip

View Answer

Question 134

A stone is rejected if it absorbs water more than

A. 5 %
B. 10 %
C. 15 %
D. 20 %

View Answer

Question 135

Crushing strength of a first class brick should not be less than

A. 3.5 N/mm²
B. 7.0 N/mm²
C. 10.5 N/mm²
D. 14.0 N/mm²

View Answer

Question 136

Spalling hammer is used for

A. Driving wooden headed chisels
B. Rough dressing of stones
C. Carving of stones
D. Breaking small projection of stones

View Answer

Question 137

Based on its dry weight, a freshly felled tree may contain water

A. 25 %
B. 50 %
C. 75 %
D. 100 %

View Answer

Question 138

The main constituent of cement which is responsible for initial setting of cement is

A. dicalcium silicate
B. tricalcium silicate
C. tricalcium aluminate
D. all of the above

View Answer

Question 139

Calcination of iron ores is done

A. To remove moisture
B. To remove carbonic acid
C. By roasting in heaps
D. All the above

View Answer

Question 140

Fibre glass

A. Retains heat-longer
B. Has a higher strength to weight ratio
C. Is shock proof and fire retardant
D. All the above

View Answer

Question 141

Bitumen is generally obtained from

A. Organic material
B. Synthetic material
C. Petroleum product
D. Coal

View Answer

Question 142

In the method of condensation polymerization,

A. Low-molecular substances are removed from the high molecular substance
B. The reaction proceeds with an evolution of ammonia
C. The reaction proceeds with an evolution of hydrogen chloride
D. All of the above

View Answer

Question 143

The variety of pig iron used for manufacture of wrought iron, is

A. Bessemer pig
B. Grey or foundry pig
C. White forge pig
D. Mottled pig

View Answer

Question 144

The type of arch generally constructed over a wooden lintel or over a flat arch for the purpose of carrying the load of the wall above is

A. segmental arch
B. pointed arch
C. relieving arch
D. flat arch

View Answer

Question 145

Kaolin is chemically classified as

A. Metamorphic rock
B. Argillaceous rock
C. Calcareous rock
D. Siliceous rock

View Answer

Question 146

The most commonly used synthetic abrasive is

A. Aluminium carbide
B. Boric acid
C. Silicon
D. All of these

View Answer

Question 147

Basalt is

A. Sedimentary rock
B. Metamorphic rock
C. Extrusive igneous rock
D. Intrusive igneous rock

View Answer

Question 148

Which of the following represents a metamorphic rock? (i) Slate (ii) Shale (iii) Quartzite

A. Only (iii)
B. Both (i) and (iii)
C. Both (ii) and (iii)
D. All (i), (ii) and (iii)

View Answer

Question 149

If the furnace is provided with insufficient fuel at low temperatures, the type of pig iron produced, is called

A. Bessemer pig
B. Grey or foundry pig
C. White or forge pig
D. Mottled pig

View Answer

Question 150

Pig iron made from haematite ores free from sulphur, phosphorus and copper, is known as

A. Bessemer pig
B. Grey or foundry pig
C. White or forge pig
D. Mottled pig

View Answer

Question 151

Plastic asphalt is

A. Used as a water proofing layer over roof
B. A mixture of cement and asphalt
C. A natural asphalt
D. A refinery product

View Answer

Question 152

Pick up the correct statement from the following:

A. Adding 5% to 6% of moisture content by weight, increases the volume of dry sand from 18% to 38%
B. The bulking of fine sand is more than that of coarse sand
C. If the percentage content of moisture exceeds 10%, increase in bulk of sand starts increasing
D. All the above

View Answer

Question 153

Cast iron is used for

A. Structural works in beams
B. Small sized water pipes
C. Columns and struts
D. None to these

View Answer

Question 154

The standard size of masonry bricks, is

A. 18 cm x 8 cm x 8 cm
B. 19 cm x 9 cm x 9 cm
C. 20 cm x 10 cm x 10 cm
D. 21 cm x 11 cm x 11 cm

View Answer

Question 155

Quick lime is (i) Slow in setting (ii) Rapid in slacking (iii) Good in strength

A. Only (i)
B. Only (ii)
C. Both (i) and (ii)
D. Both (ii) and (iii)

View Answer

Question 156

Galvanising means covering iron with a thin coat of

A. tin
B. zinc
C. glaze
D. coal tar.

View Answer

Question 157

A good brick earth should contain:

A. About 20% to 30% of alumina
B. About 50% to 60% of silica
C. Not more than 5% of lime
D. All the above

View Answer

Question 158

For preparing porcelains, the clay should be

A. sufficiently pure
B. of high degree of tanacity
C. of good plasticity
D. All the above.

View Answer

Question 159

Advantage of a clamp compared to a kiln for burning bricks is that

A. It takes less time for burning
B. It gives more output of first class bricks
C. It has less initial cost
D. It is suitable when bricks are required in large numbers

View Answer

Question 160

A well seasoned timber may contain moisture up to

A. 4 to 6 %
B. 6 to 8 %
C. 8 to 10 %
D. 10 to 12 %

View Answer

Question 161

Number of bricks required for one cubic metre of brick masonry is

A. 400
B. 450
C. 500
D. 550

View Answer

Question 162

Good quality sand is never obtained from

A. River
B. Lake
C. Sea
D. Gravel powder

View Answer

Question 163

In order of increasing percentage of silica, the correct sequence is

A. Sandy clay, calcareous clay, pure clay
B. Calcareous clay, pure clay, sandy clay
C. Pure clay, sandy clay, calcareous clay
D. None of these

View Answer

Question 164

For slaking of 10 kg of CaO, the theoretical amount of water is

A. 2.2 kg
B. 1.5 kg
C. 3.2 kg
D. None of these

View Answer

Question 165

During pudding

A. Molten metal is kept clear of the fuel
B. Carbon is converted into carbonic acid gas
C. Silicon forms a slag
D. All the above

View Answer

Question 166

The process of manufacturing steel by heating short lengths of wrought iron bars mixed with charcoal in fire clay crucibles and collecting the molten iron into moulds, is known as

A. Cementation process
B. Crucible process
C. Bessemer process
D. Open hearth process.

View Answer

Question 167

Due to attack of dry rot, the timber

A. cracks
B. shrinks
C. reduces to powder
D. none of these.

View Answer

Question 168

The ratio of the thickness of web to that of flange of steel rolled structural beams and channels is

A. Less than 1
B. Equal to 1
C. Greater than 1
D. Less than 1 in beams but greater than 1 in channels

View Answer

Question 169

The tendency of a stone is, to split along:

A. Texture
B. Fracture
C. Cleavage
D. Structure

View Answer

Question 170

Sand stone is

A. sedimentary rock
B. metamorphic rock
C. igneous rock
D. volcanic rock.

View Answer

Question 171

Bitumen felt

A. Is used as water proofing material
B. Is used as damp proofing material
C. Is made from bitumen and hessian fibres
D. All the above

View Answer

Question 172

During smelting process, the combination of fuel in the furnace

A. Forms carbon dioxide
B. Carbon dioxide with carbon forms carbon mono-oxide
C. Carbon mono-oxide reacts with Fe2O3 to form iron and liberates CO2
D. All the above

View Answer

Question 173

Lime concrete is generally used for

A. Wall foundations
B. Flooring at ground level
C. Both (A) and (B)
D. Neither (A) nor (B)

View Answer

Question 174

The most important tool in brick laying for lifting and spreading mortar and for forming joints is

A. Trowel
B. Square
C. Bolster
D. Scutch

View Answer

Question 175

Jhumb bricks are

A. Under burnt
B. Over burnt
C. Kutcha
D. None of these

View Answer

Question 176

Spirit varnish generally consists of

A. Oil, wax and resin
B. Alcohol, wax and turpentine
C. Pigment and synthetic resin
D. Spirit and shellac

View Answer

Question 177

The rocks which are formed due to cooling of magma at a considerable depth from earth's surface are called

A. Plutonic rocks
B. Hypabyssal rocks
C. Volcanic rocks
D. Igneous rocks.

View Answer

Question 178

The harmonious mixing of the clay ingredients, is known as

A. Weathering
B. Blending
C. Tempering
D. None of these

View Answer

Question 179

The initial setting time of lime-pozzolana, is

A. 30 minutes
B. 60 minutes
C. 90 minutes
D. 120 minutes.

View Answer

Question 180

Rocks formed due to alteration of original structure due to heat and excessive pressure are called

A. Sedimentary rocks
B. Igneous rocks
C. Metamorphic rocks
D. None of these

View Answer

Question 181

The commonly used thinner in oil paints, is

A. Naphtha
B. Turpentine
C. Both (a) and (b)
D. None the these

View Answer

Question 182

The foliated structure is very common in

A. Sedimentary rocks
B. Igneous rocks
C. Metamorphic rocks
D. None of these

View Answer

Question 183

Vanadium steel is generally used for

A. railway switches and crossing
B. bearing balls
C. magnets
D. axles and springs.

View Answer

Question 184

Soundness of cement is tested by

A. Vicat's apparatus
B. Le-chatelier apparatus
C. Compressive strength testing apparatus
D. None of these

View Answer

Question 185

Bullet proof glass is made of thick glass sheet sandwiched by a layer of

A. Steel
B. Stainless steel
C. High test plastic
D. Chromium plate

View Answer

Question 186

Granite is not suitable for ordinary building purpose because

A. it can not be polished
B. it is not a fire proof material
C. it is costly
D. it has less crushing strength

View Answer

Question 187

Lime stone is not a

A. Sedimentary rock
B. Stratified rock
C. Aqueous rock
D. Metamorphic rock

View Answer

Question 188

Pick up the correct statement from the following:

A. Acid test is done to find out the weathering quality of stones
B. Attrition test is done to find out the rate of wear of stones which are used in road construction
C. Crushing test is done to find out the compressive strength of the stone
D. All the above

View Answer

Question 189

The compound of Portland cement which contributes to the strength after two to three years is

A. Tri-calcium silicate
B. Di-calcium silicate
C. Tri-calcium aluminate
D. Tetra-calcium alumino ferrite

View Answer

Question 190

Brittleness of cold is due to an excess of

A. sulphur
B. carbon
C. phosphorus
D. silicon.

View Answer

Question 191

The rocks formed by gradual deposition, are called

A. Sedimentary rocks
B. Igneous rocks
C. Metamorphic rocks
D. None of these

View Answer

Question 192

Assertion A : Paints with white lead base are not recommended for painting of iron works.Reason R : Paints with white lead base do not check rusting of iron.Select your answer according to the coding system given below:

A. Both A and R is true and, R is the correct explanation of A
B. Both A and R is true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true

View Answer

Question 193

With increase in moisture content, the bulking of sand

A. Increases
B. Decreases
C. First increases to a certain maximum value and then decreases
D. First decreases to a certain minimum value and then increases

View Answer

Question 194

In the method of condensation polymerization,

A. low-molecular substances are removed from the high molecular substance
B. the reaction proceeds with an evolution of ammonia
C. the reaction proceeds with an evolution of hydrogen chloride
D. all the above.

View Answer

Question 195

Initial setting time of cement for asbestos cement products should be not less than

A. 30 minutes
B. 50 minutes
C. 75 minutes
D. 90 minutes.

View Answer

Question 196

Asbestos cement

A. Is brittle
B. Warps due to changes in humidity
C. Strength is lowered when saturated by water
D. All of the above

View Answer

Question 197

Good quality stones must

A. be durable
B. be free from clay
C. resist action of acids
D. all the above.

View Answer

Question 198

Excess of silica in brick earth results in

A. cracking and warping of bricks
B. loss of cohesion
C. enhancing the impermeability of bricks
D. none of the above

View Answer

Question 199

Gneiss is obtained from

A. Igneous rocks
B. Metamorphic rocks
C. Sedimentary rocks
D. Sedimentary metamorphic rocks

View Answer

Question 200

The cast iron when heated to red heat with powdered red haematite in an oven for increasing its toughness, is converted to

A. Grey cast iron
B. White cast iron
C. Mottled cast iron
D. Toughed cast iron

View Answer

Question 201

The rocks in which argil (or clay) predominates, are called

A. Siliceous rocks
B. Argillaceous rocks
C. Calcareous rocks
D. Igneous rocks

View Answer

Question 202

Red short iron cracks when bent due to the presence of

A. Sulphur
B. Carbon
C. Phosphorus
D. Silicon

View Answer

Question 203

Bitumen may be dissolved in

A. Carbondioxide
B. Water
C. Sodium chloride
D. Carbon disulphide

View Answer

Question 204

Bulking of sand is caused due to

A. Surface moisture
B. Air voids
C. Viscosity
D. Clay contents

View Answer

Question 205

Asbestos cement

A. is brittle
B. warps due to changes in humidity
C. strength is lowered when saturated by water
D. all the above.

View Answer

Question 206

Lime putty

A. Is made from hydraulic lime
B. Is made by adding lime to water
C. Can be used only upto three days
D. All of above

View Answer

Question 207

For filling cracks in masonry structures, the type of bitumen used, is

A. cut-back bitumen
B. bitumen-emulsion
C. blown bitumen
D. plastic bitumen.

View Answer

Question 208

Pick up the correct statement from the following:

A. Air bubbles in casting produce a dull sound by tapping their surfaces lightly with a hammer
B. Cupola furnace is used for the manufacture of cast iron
C. Red short iron is of no value for welding purpose
D. All the above

View Answer

Question 209

The main function of alumina in brick earth is

A. To impart plasticity
B. To make the brick durable
C. To prevent shrinkage
D. To make the brick impermeable

View Answer

Question 210

Pick up the synthetic resin from the following:

A. Urea resin
B. Phenolic resin
C. Resorcinol resin
D. All of these

View Answer

Question 211

Chemically, marble is known as

A. Metamorphic rock
B. Argillaceous rock
C. Calcareous rock
D. Siliceous rock

View Answer

Question 212

Asbestos

A. Is a natural fibrous mineral substance
B. Is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3)
C. Contains iron oxide and alumina
D. All the above

View Answer

Question 213

Distemper is

A. A paint consisting of powdered chalk, pigments and water
B. A water proofing agent
C. A paint consisting of colored cement and water
D. A drying agent

View Answer

Question 214

Putty is

A. Made with finely powdered chalk and linseed oil
B. Used for fixing glass panes
C. Softened by a solution of pearl ash and quick-lime soaked in water
D. All the above

View Answer

Question 215

For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of

A. 1 : 2
B. 1 : 3
C. 1 : 4
D. 1 : 6

View Answer

Question 216

Pick up the correct statement from the following:

A. Blistering may be cured by applying water paint finished with oil paint dried with a little copal varnish
B. Cracked paints may be cured by removing paint and giving a fresh coat of paint
C. Crawling paints may be cured by sand preparing the surface and giving a fresh coat with plenty of turps
D. All the above

View Answer

Question 217

The normal consistency of ordinary Portland cement is about

A. 10 %
B. 20 %
C. 30 %
D. 40 %

View Answer

Question 218

Sapwood consists of

A. Innermost annular rings around the pith
B. Portion of timber between heartwood and cambium layer
C. Thin layers below the bark
D. Thin fibre which extends from the pith outwards and holds the annular rings together

View Answer

Question 219

Plywood is normally available

A. 1 mm thick
B. 2 mm thick
C. 2 to 3 mm thick
D. 3 mm to 4 mm thick

View Answer

Question 220

Which of the following sedimentary rocks changes into quartzite by metamorphic action?

A. Sand stone
B. Lime stone
C. Shale
D. Gypsum

View Answer

Question 221

Slacking of lime is affected by

A. Keeping it exposed to air
B. Immersing the lime in water
C. Crushing the lime lumps
D. None of these

View Answer

Question 222

Compared to mild steel, cast iron has (i) High compressive strength (ii) High tensile strength (iii) Low compressive strength (iv) Low tensile strength

A. (i) and (ii)
B. (ii) and (iii)
C. (iii) and (iv)
D. (i) and (iv)

View Answer

Question 223

The normal curing period for lime mortar, is:

A. 1 day
B. 3 days
C. 7 days
D. 10 days

View Answer

Question 224

Refractory bricks resist

A. High temperature
B. Chemical action
C. Dampness
D. All the above

View Answer

Question 225

A queen closer is a

A. Brick laid with its length parallel to the face or direction of wall
B. Brick laid with its breadth parallel to the face or direction of wall
C. Brick having the same length and depth as the other bricks but half the breadth
D. Brick with half the width at one end and full width at the other

View Answer

Question 226

Which of the following stresses is used for identifying the quality of structural steel?

A. Ultimate stress
B. Yield stress
C. Proof stress
D. None of the above

View Answer

Question 227

Pick up the correct statement from the following: Method of sawing timber

A. Tangentially to annual rings, is known as tangential method
B. In four quarters such that each board cuts annual rings at angles not less than 45°, is known as quarter sawing method
C. Cut out of quarter logs, parallel to the medullary rays and perpendicular to annual rings, is known as radial sawing
D. All the above

View Answer

Question 228

For one cubic metre of brick masonry, number of bricks required, is

A. 400
B. 425
C. 450
D. 500

View Answer

Question 229

Portland cement manufactured from pure white chalk and clay but free from iron-oxide, is known as

A. Quick setting cement
B. Rapid hardening cement
C. White cement
D. Low heat Portland cement

View Answer

Question 230

Pick up the correct statement regarding low heat cement from the following:

A. It possesses less compressive strength
B. Its initial setting time is about one hour
C. Its final setting time is about 10 hours
D. All the above

View Answer

Question 231

Pick up the correct statement from the following:

A. In basic Bessemer process, the steel heats the converter
B. In open-hearth process, the furnace heats the steel
C. In Siemens process, the impurities of pig iron are oxidized by the oxygen of the ore
D. All the above

View Answer

Question 232

The amount of water used for one kg of distemper is

A. 0.2 liter
B. 0.4 liter
C. 0.6 liter
D. 0.8 liter

View Answer

Question 233

The commonly used drying oil for oil paints, is

A. Olive oil
B. Linseed oil
C. Kerosene oil
D. Acetate of lead

View Answer

Question 234

The hardest rock is

A. Marble
B. Diamond
C. Talc
D. Quartz

View Answer

Question 235

The main constituent which imparts hydraulicity to hydraulic lime is

A. Calcium oxide
B. Silica
C. Clay
D. Water

View Answer

Question 236

Which of the following should be used for hearting of thicker walls?

A. Headers
B. Stretchers
C. Brick bats
D. Queen closer

View Answer

Question 237

Pug mill is used for

A. Preparation of clay
B. Moulding of clay
C. Drying of bricks
D. Burning of bricks

View Answer

Question 238

Which of the following cements contains maximum percentage of dicalcium silicate?

A. Ordinary Portland cement
B. Low heat cement
C. Rapid hardening cement
D. Sulphate resisting cement

View Answer

Question 239

Manganese steels

A. Are non-magnetic
B. Possess high electrical resistance
C. Possess low coefficient of expansion
D. All the above

View Answer

Question 240

Assertion A : Pure lime takes a long time to develop adequate strength.Reason R : Pure lime has slow hardening characteristics.Select your answer according to the coding system given below:

A. Both A and R is true and R is correct explanation of A
B. Both A and R is true and R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true

View Answer

Question 241

Pick up the correct statement from the following:

A. Bull's trench kiln a trench excavated in ground
B. Hoffman's kiln is constructed over ground
C. Tunnel Kiln is constructed as a tunnel
D. All the above

View Answer

Question 242

The process of decarbonising the pig iron completely and then adding proper percentage of carbon for manufacturing steel, is called

A. Cementation process
B. Crucible process
C. Bessemer process
D. Open hearth process

View Answer

Question 243

The type of steel used for precision levelling staff, is

A. Titanium steel
B. Carbon steel
C. Invar
D. Stainless steel

View Answer

Question 244

Which one of the following polymers is obtained from condensation polymerization?

A. Phenol formaldehyde
B. Carbamide
C. Melamine-formaldehyde
D. All of these

View Answer

Question 245

Knots in timber are

A. Defects caused by crushing fibres
B. Splits radiating from the centre
C. Speckled strains
D. Signs of branches cut off

View Answer

Question 246

Quick lime

A. Generates heat when added to water
B. Reacts with carbon dioxide
C. May be used for white-washing
D. All the above

View Answer

Question 247

Pick up the correct statement from the following:

A. Lime is available in Free State
B. Lime is available by dissolving calcium carbonate in water
C. Lime is available by calcining calcium carbonate at 900°C
D. Lime is nothing but calcium chloride

View Answer

Question 248

Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth?

A. Lime stone and alumina
B. Silica and alkalies
C. Alumina and iron
D. Alkalies and magnesium

View Answer

Question 249

Pick up the correct statement from the following:

A. The heating of a material to redness in contact with air, is known as calcination
B. The property of lime by which it sets or hardens in damp places having no free circulation of air is called setting
C. The product that remains after calcination of limestone, is called lime
D. All the above

View Answer

Question 250

The frog of the brick in a brick masonry is generally kept on

A. Bottom face
B. Top face
C. Shorter side
D. Longer side

View Answer

Question 251

Second class bricks

A. Are of dark brown color
B. Produce a metallic sound when struck
C. Are well burnt
D. Are under burnt

View Answer

Question 252

The practical limit of moisture content achieved in air drying of timber is

A. 5 %
B. 15 %
C. 25 %
D. 35 %

View Answer

Question 253

Pick up the correct statement from the following:

A. The percentage of absorption for firebricks varies from 5 to 10
B. The percentage of silica in silica bricks is to the extent of about 95 to 97 percent
C. Roughly 1 to 2 percent of lime in silica bricks is added to act as binding material
D. All the above

View Answer

Question 254

Pick up the correct statement from the following:

A. In stone arches, the stones are placed with their natural beds radial
B. In cornices, the stones are placed with their natural beds as vertical
C. In stone walls, the stones are placed with their natural beds as horizontal
D. All the above.

View Answer

Question 255

Which of the following timbers is suitable for making sports goods?

A. Mulberry
B. Mahogany
C. Sal
D. Deodar

View Answer

Question 256

Shingle is

A. Decomposed laterite
B. Crushed granite
C. Water bound pebbles
D. Air weathered rock

View Answer

Question 257

Resins are

A. Not soluble in water
B. Soluble in spirit
C. Used in varnishes
D. Left behind on evaporation of oil

View Answer

Question 258

Hydraulic lime is obtained by

A. Burning of lime stone
B. Burning of kankar
C. Adding water to quick lime
D. Calcination of pure clay

View Answer

Question 259

Addition of pozzolana to ordinary Portland cement increases

A. Bleeding
B. Shrinkage
C. Permeability
D. Heat of hydration

View Answer

Question 260

Good quality stones must

A. Be durable
B. Be free from clay
C. Resist action of acids
D. All the above

View Answer

Question 261

The age of a tree can be known by examining

A. Cambium layer
B. Annular rings
C. Medullary rays
D. Heart wood

View Answer

Question 262

Quick setting cement is produced by adding

A. Less amount of gypsum in very fine powdered form
B. More amount of gypsum in very fine powdered form
C. Aluminium sulphate in very fine powdered form
D. Pozzolana in very fine powdered form

View Answer

Question 263

The clay to be used for manufacturing bricks for a large project, is dugout and allowed to weather throughout

A. The monsoon
B. The winter
C. The summer
D. None of these

View Answer

Question 264

Which of the following stone is best suited for construction of piers and abutments of a railway bridge?

A. Granite
B. Sand stone
C. Lime stone
D. Quartzite

View Answer

Question 265

Wrought iron contains carbon about

A. 1.5% to 5.5%
B. 0.5% to 1.75%
C. 0.1% to 0.25%
D. none to these.

View Answer

Question 266

Pick up the correct statement from the following:

A. The free quartz suddenly expands at a temperature lower than 600°C
B. The lime stone resists fire upto about 800°C and at higher temperature it splits into CaO and CO2
C. The sand stone with silicates resist a fire in a better way
D. All the above

View Answer

Question 267

Veneering means

A. Carving out designs on timber planks
B. Chemically treating timber planks
C. Thick layer of superior wood glued to inferior wood
D. Thin layer of superior wood glued to inferior wood

View Answer

Question 268

Seasoning of timber is done

A. To make it water proof
B. To paint its surface
C. To increase its temperature
D. To remove water

View Answer

Question 269

The nominal size of the modular brick is

A. 190 mm × 90 mm × 80 mm
B. 190 mm × 190 mm × 90 mm
C. 200 mm × 100 mm × 100 mm
D. 200 mm × 200 mm × 100 mm

View Answer

Question 270

The fire clay contains pure

A. Lime
B. Oxide of iron
C. Hydrated aluminium silicate
D. Magnesium

View Answer

Question 271

Study the following statements. (i) Hydraulic lime is suitable for white washing, (ii) Fat lime is suitable for whitewashing, (iii) Hydraulic lime is suitable for making mortar, (iv) Fat lime is suitable for making mortar.

A. (i) and (iv)
B. (ii) and (iii)
C. (i) and (ii)
D. (iii) and (iv)

View Answer

Question 272

The trunk of tree left after cutting all the branches is known as

A. Log
B. Batten
C. Plank
D. Baulk

View Answer

Question 273

As per IS specifications, the maximum final setting time for ordinary Portland cement should be

A. 30 minutes
B. 1 hour
C. 6 hours
D. 10 hours

View Answer

Question 274

Plastic bitumen is generally used for

A. Road pavements
B. Expansion joints
C. Crack fillings
D. None to these

View Answer

Question 275

The type of bond provided in brick masonry for carrying heavy loads is

A. Single Flemish bond
B. Double Flemish bond
C. English bond
D. Zigzag bond

View Answer

Question 276

Pick up the incorrect statement from the following:

A. Plastics are chemical resistant
B. Plastics are durable
C. Plastics are ductile
D. Plastics are excellent electric insulators

View Answer

Question 277

Jumper is a tool used for

A. Testing of stones
B. Quarrying of stones
C. Dressing of stones
D. None of the above

View Answer

Question 278

Sandstone is a (i) Sedimentary rock (ii) Aqueous rock (iii) Siliceous rock

A. Only (i)
B. Both (i) and (ii)
C. Both (i) and (iii)
D. All (i), (ii) and (iii)

View Answer

Question 279

Percentage of silica in a good brick earth lies between

A. 5 to 10 %
B. 20 to 30 %
C. 50 to 60 %
D. 70 to 80 %

View Answer

Question 280

Pick up the correct statement from the following:

A. The substance which consists of one primary chemical, is known as monomer
B. The polymer consists of thousands of monomers joined together
C. The polymer molecule is called macro-molecule
D. All the above

View Answer

Question 281

The most fire resistant paints are:

A. Enamel paints
B. Aluminium paints
C. Asbestos paints
D. Cement paints

View Answer

Question 282

Non acid-resistant asbestos is:

A. Tremolite asbestos
B. Chrysotile asbestos
C. Amosite asbestos
D. None of these

View Answer

Question 283

Iron ore may contain

A. Carbon
B. Silicon
C. Phosphorus and manganese
D. All the above

View Answer

Question 284

Plaster of Paris is obtained by calcining

A. Bauxite
B. Gypsum
C. Lime stone
D. None of these

View Answer

Question 285

For a good building stone, its specific gravity should the greater than

A. 1.5
B. 1.7
C. 2.2
D. 2.7

View Answer

Question 286

Pick up the correct statement from the following:

A. Rusting is caused due to combined action of air, moisture and carbon dioxide
B. During rusting, first ferrous bicarbonates are formed
C. On further oxidation ferrous bicarbonates get converted to ferric bicarbonates
D. All the above

View Answer

Question 287

Durability of building stone is affected by its

A. Chemical composition
B. Texture
C. Resistance to atmosphere
D. All the above

View Answer

Question 288

For high grade instruments the steel preferred to, is

A. Cast steel
B. Bessemer steel
C. Mild steel
D. Whitworth compressed steel

View Answer

Question 289

Minimum thickness of wall where single Flemish bond can be used is

A. Half brick thick
B. One brick thick
C. One and a half bricks thick
D. Two bricks thick

View Answer

Question 290

Index number expressing the relative sizes of both coarse and fine aggregates, is called

A. Proportioning of aggregates
B. Fineness modulus
C. Grading of aggregates
D. None of these

View Answer

Question 291

The most commonly used retarder in cement is

A. Gypsum
B. Calcium chloride
C. Calcium carbonate
D. None of the above

View Answer

Question 292

Generally wooden moulds are made from

A. Ply wood
B. Shishum wood
C. Deodar wood
D. Teak wood

View Answer

Question 293

Softer variety of steel may be obtained by

A. Cementation process
B. Crucible process
C. Bessemer process
D. Open hearth process

View Answer

Question 294

Quartzite is a

A. metamorphic rock
B. argillaceous rock
C. calcareous rock
D. silicious rock.

View Answer

Question 295

Bessemer process is used for the manufacture of

A. Pig iron
B. Cast iron
C. Wrought iron
D. Steel

View Answer

Question 296

Which of the following is a rock?

A. Quartz
B. Mica
C. Gypsum
D. None of the above

View Answer

Question 297

Good quality cement contains higher percentage of

A. Tri-calcium silicate
B. Di-calcium silicate
C. Tri-calcium aluminate
D. Tetra calcium alumino ferrite

View Answer

Question 298

Bitumen emulsion is

A. A liquid containing bitumen in suspension
B. A paint
C. Used as anti-corrosive paint
D. All the above

View Answer

Question 299

The preparation of surface of stone to obtain plain edges or to obtain stones of required size and shape is known as

A. Quarrying of stones
B. Blasting of stones
C. Seasoning of stones
D. Dressing of stones

View Answer

Question 300

The lime which contains mainly calcium oxide and slacks with water, is

A. Fat lime
B. Quick lime
C. Hydraulic lime
D. Poor lime

View Answer

Question 301

Linseed oil is used in paints as

A. Thinner
B. Vehicle
C. Base
D. Drier

View Answer

Question 302

Fibre boards can be

A. Distempered
B. Painted
C. Painted and distempered
D. Used for furniture

View Answer

Question 303

Pick up the correct statement from the following:

A. Roasting is not necessary if iron ore is an oxide
B. Impurities float on the molten iron as slag
C. The slag contains lime about 45%
D. All the above

View Answer

Question 304

Geologically, marble is known as

A. Sedimentary rock
B. Igneous rock
C. Metamorphic rock
D. Stratified rock

View Answer

Question 305

For testing compressive strength of cement, the size of cube used is

A. 50 mm
B. 70.6 mm
C. 100 mm
D. 150 mm

View Answer

Question 306

A badly mixed cement concrete results in

A. Segregation
B. Bleeding
C. Honey combing
D. None of these

View Answer

Question 307

The filler used in plastic bitumen, is

A. Shale powder
B. Talc powder
C. Asbestos powder
D. Plastic powder

View Answer

Question 308

Gniess is obtained from

A. igneous rocks
B. metamorphic rocks
C. sedimentary rocks
D. sedimentary metamorphic rocks.

View Answer

Question 309

The cement becomes unsound by the presence of excess

A. Sulphur
B. Magnesia
C. Lime
D. All of these

View Answer

Question 310

Pick up the correct statement from the following:

A. The phenol is carbolic acid
B. The phenol is either extracted from coal-tar or prepared from benzene
C. Phenol reacts with formaldehyde, to form phenol formaldehyde resin
D. All the above

View Answer

Question 311

Galvanising means covering iron with a thin coat of

A. Tin
B. Zinc
C. Glaze
D. Coal tar

View Answer

Question 312

The clay to be used for manufacturing bricks for a large project, is dugout and allowed to weather throughout

A. the monsoon
B. the winter
C. the summer
D. none of these.

View Answer

Question 313

The pigment used in paints for corrosive resistance, is

A. White lead
B. Ferrous oxide
C. Zinc white
D. Red lead

View Answer

Question 314

Cast iron

A. Is obtained by purifying pig iron
B. Is manufactured in required shapes
C. May contain 2 to 5 per cent of carbon with other impurities
D. All the above

View Answer

Question 315

Elastomers can extend upto

A. five times their original dimensions
B. seven times their original dimensions
C. ten times their original dimensions
D. three times their original dimensions.

View Answer

Question 316

Bitumen completely dissolves in

A. Carbon bisulphide
B. Chloroform
C. Coal tar
D. All of these

View Answer

Question 317

The percentage of alumina and silica in good fire clay vary respectively is

A. 25, 75
B. 30, 70
C. 35, 65
D. All of these

View Answer

Question 318

Pick up the correct statement from the following:

A. Quick lime is obtained by burning pure lime stone
B. Hydraulic lime is obtained by burning lime stone containing clay 5% to 30%
C. Poor lime is obtained by burning lime stone containing impurities more than 5%
D. All the above

View Answer

Question 319

The maximum quantity of calcium chloride used as an accelerator in cement in percentage by weight of cement is

A. 1
B. 2
C. 3
D. 4

View Answer

Question 320

For obtaining vinyl chloride acetate, the method used, is

A. Addition polymerization
B. Condensation polymerization
C. Co-polymerization
D. None of these

View Answer

Question 321

Stainless steel contains

A. 18% of chromuim and 8% nickel
B. 8% of chromium and 18% of nickel
C. 12% of chromium and 36% of nickel
D. 36% of chromium and 12% of nickel.

View Answer

Question 322

Lime mortar is generally made with

A. Quick lime
B. Fat lime
C. Hydraulic lime
D. Plain lime

View Answer

Question 323

Chlorite, a green colour mineral is mainly derived from the decomposition of

A. Augite
B. Biotite
C. Hornblende
D. All of these

View Answer

Question 324

Pick up the polymineralic rock from the following:

A. Quartz sand
B. Pure gypsum
C. Magnesite
D. Granite

View Answer

Question 325

Cross cut saw is used for

A. Cutting soft stones
B. Cutting hard stones
C. Cutting large blocks of stones
D. Dressing stones

View Answer

Question 326

Rapid hardening cement contains

A. Tri-calcium silicate
B. Tri-calcium aluminate
C. Tetra-calcium alumino-ferrite
D. Di-calcium silicate

View Answer

Question 327

Depending on the chemical composition and mechanical properties, iron may be classified as

A. cast iron
B. wrought iron
C. steel
D. all the above.

View Answer

Question 328

If ‘P’ is the percentage of water required for normal consistency, water to be added for determination of initial setting time, is

A. 0.70 P
B. 0.75 P
C. 0.80 P
D. 0.85 P

View Answer

Question 329

In brick masonry the bond produced by laying alternate headers and stretchers in each course is known as

A. English bond
B. double flemish bond
C. zigzag bond
D. single flemish bond

View Answer

Question 330

Slate is formed by metamorphic action on

A. Shale
B. Lime stone
C. Sand stone
D. Granite

View Answer

Question 331

Sand stone is

A. Sedimentary rock
B. Metamorphic rock
C. Igneous rock
D. Volcanic rock

View Answer

Question 332

Forge pig may be converted to wrought iron by

A. Rolling
B. Pudding
C. Shingling
D. Refining

View Answer

Question 333

The type of roof which slopes in two directions with a break in the slope on each side is known as

A. gable roof
B. hip roof
C. gambrel roof
D. mansard roof

View Answer

Question 334

In the cement the compound quickest to react with water, is

A. Tricalcium aluminate
B. Tetra-calcium alumino-ferrite
C. Tricalcium silicate
D. Dicalcium silicate.

View Answer

Question 335

Le-Chatelier's device is used for determining the

A. Setting time of cement
B. Soundness of cement
C. Tensile strength of cement
D. Compressive strength of cement

View Answer

Question 336

A volatile substance added to a paint to make its application easy and smooth, is known as

A. Base
B. Solvent
C. Vehicle
D. None to these

View Answer

Question 337

The stones obtained by blasting are used as

A. Ballast in railways
B. Aggregates for concrete
C. Road metal
D. All the above

View Answer

Question 338

In arches, stratified stones are placed so that their planes are

A. Parallel
B. Perpendicular
C. Radial
D. None of these

View Answer

Question 339

Which of the following metamorphic rocks has the most weather resisting characteristics?

A. Marble
B. Quartzite
C. Slate
D. Lime stone

View Answer

Question 340

Wrought iron is used for

A. Structural works in beams
B. Small sized water pipes
C. Columns and struts
D. None to these

View Answer

Question 341

Asphalt is obtained from

A. Petroleum distillation
B. Bitumen distillation
C. Plastic distillation
D. None of these

View Answer

Question 342

Asbestos

A. Is an excellent insulator for heat and electricity
B. Is fire-proof and acid proof
C. Has sp. gravity equal to 3.10
D. All the above

View Answer

Question 343

Permanent magnets are made of high carbon steel and

A. 15% of cobalt
B. 20% of cobalt
C. 35% of cobalt
D. 45% of cobalt

View Answer

Question 344

The initial setting time for ordinary Portland cement as per IS specifications should not be less than

A. 10 minutes
B. 30 minutes
C. 60 minutes
D. 600 minutes

View Answer

Question 345

Gypsum consists of

A. H₂S and CO₂
B. CaSO4 and H₂O
C. Lime and H₂O
D. CO₂ and calcium

View Answer

Question 346

The steel used for the manufacture of rails, is

A. Bessemer steel
B. Mild steel
C. Cast steel
D. Stainless steel

View Answer

Question 347

Which of the following ingredients of the brick earth enables the brick to retain its shape?

A. Alumina
B. Silica
C. Iron
D. Magnesia

View Answer

Question 348

Mastic asphalt is

A. Water proof
B. Fire proof
C. Elastic
D. All the above

View Answer

Question 349

For sanitary pipes and chemical stonewares,

A. Salt glazing is used
B. Lead glazing is used
C. Opaque glazing is used
D. None of these

View Answer

Question 350

Age of a tree may be ascertained by

A. Radius of its stem
B. Circumference of its stem
C. Number of branches
D. Number of annual rings

View Answer

Question 351

Ultimate strength to cement is provided by

A. Tri-calcium silicate
B. Di-calcium silicate
C. Tri-calcium aluminate
D. Tetra calcium alumino ferrite

View Answer

Question 352

Acrylic sheets

A. Possess 10 to 17 times greater breakage resistance than that of glass of equivalent thickness
B. Are generally unaffected by most household detergents
C. Possess the light transmission rate of 93%
D. All the above

View Answer

Question 353

Assertion A : Normally turpentine oil is recommended as thinner for indoor painting.Reason R : Turpentine oil is costlier than other thinners.Select your answer according to the coding system given below:

A. Both A and R is true and R is the correct explanation of A
B. Both A and R is true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true

View Answer

Question 354

Formula for quick lime, is

A. CaCO₃
B. Ca(OH)₂
C. CO₃CO₂
D. None to these

View Answer

Question 355

Which of the following cements is suitable for use in massive concrete structures such as large dams?

A. Ordinary Portland cement
B. Low heat cement
C. Rapid hardening cement
D. Sulphate resisting cement

View Answer

Question 356

Vanadium steel is generally used for

A. Railway switches and crossing
B. Bearing balls
C. Magnets
D. Axles and springs

View Answer

Question 357

Plywood has the advantage of

A. Greater tensile strength in longer direction
B. Greater tensile strength in shorter direction
C. Same tensile strength in all directions
D. None of the above

View Answer

Question 358

The rocks which are formed due to cooling of magma at a relatively shallow depth from the earth's surface are called

A. Plutonic rocks
B. Hypabyssal rocks
C. Volcanic rocks
D. Igneous rocks

View Answer

Question 359

Which of the following gradients exerts maximum influence on properties of steel?

A. iron
B. carbon
C. manganese
D. sulphur

View Answer

Question 360

Pick up the correct statement from the following:

A. The plastic bottles are made by the process of blowing
B. The application of thermo-setting resins on sheets of paper, is called laminating process
C. The plastic articles made by placing raw material in the desired moulds, is known as moulding process
D. All the above

View Answer

Question 361

Cast steel is manufactured by

A. Cementation process
B. Crucible process
C. Bessemer process
D. Open hearth process

View Answer

Question 362

Early attainment of strength in rapid hardening cement is mainly due to

A. Gypsum
B. Finer grinding
C. Tri-calcium silicate
D. Tri-calcium aluminate

View Answer

Question 363

Inner part of a timber log surrounding the pitch, is called

A. Sapwood
B. Cambium layer
C. Heart wood
D. None to these

View Answer

Question 364

Which of the following trees yields hard wood?

A. Deodar
B. Chir
C. Shishum
D. Pine

View Answer

Question 365

Pick up the correct statement from the following:

A. For thin structures subjected to wetting and drying, the water cement ratio should be 0.45
B. For mass concrete structures subjected to wetting and drying, the water ratio should be 0.55
C. For thin structures which remain continuously under water, the water-cement ratio by weight should be 0.55
D. All the above

View Answer

Question 366

A heavy stone is suitable for

A. Arches
B. Rubble masonry
C. Roads
D. Retaining walls

View Answer

Question 367

French polish is

A. Oil paint
B. Distemper
C. Spirit varnish
D. None to these

View Answer

Question 368

Stones used for ornamental work must be

A. Soft
B. Hard
C. Light
D. Heavy

View Answer

Question 369

The yield strength and tensile strength of low carbon steel may be improved by the addition of

A. Manganese
B. Chromium
C. Nickel
D. Vanadium

View Answer

Question 370

Plastics are compounds of carbon with element

A. Hydrogen
B. Nitrogen
C. Oxygen
D. All of these

View Answer

Question 371

Pick up the correct statement from the following:

A. Soft stones are required for carving
B. Light stones are required for arches
C. Hard stones are required to stand high pressure
D. All the above

View Answer

Question 372

The vehicle used in case of enamel paints is usually

A. Linseed oil
B. Water
C. Varnish
D. None of the above

View Answer

Question 373

The percentage of alumina in a good brick earth lies between

A. 5 to 10 %
B. 20 to 30 %
C. 50 to 60 %
D. 70 to 80 %

View Answer

Question 374

Pick up the incorrect statement from the following:

A. Hydraulic lime is generally obtained by burning kankar
B. Hydraulic lime sets slowly as compared to fat lime
C. Hydraulic lime is generally used in lime mortar
D. None of these

View Answer

Question 375

The usual percentages of clay and metal in cermet are:

A. 50%, 50%
B. 60%, 40%
C. 70%, 30%
D. 80%, 20%

View Answer

Question 376

Pig iron is manufactured from the ores by

A. Dressing
B. Calcination and roasting
C. Smelting
D. All the above

View Answer

Question 377

The constituent of cement which is responsible for all the undesirable properties of cement is

A. Di-calcium silicate
B. Tri-calcium silicate
C. Tri-calcium aluminate
D. Tetra calcium alumino ferrite

View Answer

Question 378

The proportions of lime and sand in the mortar normally used in brick construction are

A. 1 : 2
B. 1 : 4
C. 1 : 6
D. 1 : 8

View Answer

Question 379

Brass is an alloy of

A. Copper and zinc
B. Zinc and lead
C. Tin and silver
D. Zinc and nickel

View Answer

Question 380

For melting one tonne of cast iron

A. 700 m3 air is required
B. 20 kg limestone is required
C. One quintal coke is required
D. All the above

View Answer

Question 381

Commonly used thinner in

A. Lacquer paints, is alcohol
B. Cellulose paints is ethyl acetate
C. Oil paints, is naphtha
D. All the above

View Answer

Question 382

Lacquer is

A. Oil paint
B. Distemper
C. Spirit varnish
D. None to these

View Answer

Question 383

Depending on the chemical composition and mechanical properties, iron may be classified as

A. Cast iron
B. Wrought iron
C. Steel
D. All the above

View Answer

Question 384

The size of mould for bricks, is generally kept

A. A little large to specified size
B. A little small to specified size
C. Equal to specified size
D. 10% larger than specified size

View Answer

Question 385

The main constituent of fly-ash, is

A. aluminium oxide
B. silica
C. ferrous oxide
D. All of these.

View Answer

Question 386

Whitworth compressed steel is obtained when molten steel is subjected to a pressure of

A. 5 kg/mm²
B. 9 kg/mm²
C. 13 kg/mm²
D. 15 kg/mm²

View Answer

Question 387

In stone masonry, stones (stratified rocks) are so placed that the direction of pressure to the plane of bedding is

A. Right angles
B. 45°
C. 60°
D. Parallel

View Answer

Question 388

Sewer pipes are made of

A. Earthen ware
B. Stone ware
C. Refractory clay
D. All the above

View Answer

Question 389

For the manufacture of plywood, veneers are placed so that grains of adjacent veneers

A. Run at right angles
B. Parallel
C. Inclined at 45°
D. Inclined at 60°

View Answer

Question 390

Pick up the hypabyssal rock from the following:

A. Granite
B. Dolerite
C. Basalt
D. All the above.

View Answer

Question 391

Turpentine oil is used in paints as

A. Thinner
B. Vehicle
C. Base
D. Drier

View Answer

Question 392

The process of manufacturing steel by heating short lengths of wrought iron bars mixed with charcoal in fire clay crucibles and collecting the molten iron into moulds, is known as

A. Cementation process
B. Crucible process
C. Bessemer process
D. Open hearth process

View Answer

Question 393

Clay and silt content in a good brick earth must be at least

A. 50 %
B. 40 %
C. 30 %
D. 25 %

View Answer

Question 394

Pick up the correct statement from the following:

A. In basic Bessemer process, the steel heats the converter
B. In open-hearth process, the furnace heats the steel
C. In Siemens process, the impurities of pig iron are oxidised by the oxygen of the ore
D. all the above.

View Answer

Question 395

When a brick is immersed in water for 24 hours and then dried, if

A. No grey or white deposits appear on the surface, the brick is free from soluble salts
B. 10 percent surface is covered with grey or white deposits, the brick has slight efflorescence
C. 50 percent surface is covered with grey or white deposits, the brick has serious efflorescence
D. All the above

View Answer

Question 396

The most important constituent of varnish, is

A. Drier
B. Solvent
C. Resin
D. All the above

View Answer

Question 397

According to IS 399-1963, the weight of the timber is specified at

A. 8% moisture content
B. 10% moisture content
C. 12% moisture content
D. 14% moisture content

View Answer

Question 398

The method of addition polymerization is used for obtaining:

A. Polystyrene
B. Polypropylene
C. Polyvinylchloride
D. All of these

View Answer

Question 399

Wrought iron contains carbon upto

A. 0.25 %
B. 1.0 %
C. 1.5 %
D. 2.0 %

View Answer

Question 400

The slump recommended for mass concrete is about

A. 25 mm to 50 mm
B. 50 mm to 100 mm
C. 100 mm to 125 mm
D. 125 mm to 150 mm

View Answer

Question 401

Asbestos is

A. Corrugated sheet used for roofing
B. An incombustible fire proof material
C. An organic substance
D. All the above

View Answer

Question 402

The specific gravity of marble, is

A. 2.5
B. 2.6
C. 2.66
D. 2.72

View Answer

Question 403

Pick up the correct statement from the following:

A. Hornblende mineral is brittle
B. Muscovite is also known as white mica and potash mica
C. Biotite is also known as black-mica
D. All the above

View Answer

Question 404

For preparing porcelains, the clay should be

A. Sufficiently pure
B. Of high degree of tenacity
C. Of good plasticity
D. All the above

View Answer

Question 405

Excess of alumina in brick earth makes the brick

A. Impermeable
B. Brittle and weak
C. To lose cohesion
D. To crack and warp on drying

View Answer

Question 406

The stone suitable for rubble masonry should be.

A. Hard
B. Tough
C. Heavy
D. Light

View Answer

Question 407

First class timber has an average life of

A. Less than one year
B. 1 to 5 years
C. 5 to 10 years
D. More than 10 years

View Answer

Question 408

Which one of the following is an air binding material?

A. Gypsum
B. Acid-resistant cement
C. Quick lime
D. All of these

View Answer

Question 409

Varnish is a transparent or semi-transparent solution of resinuous substances in

A. alcohol
B. linseed
C. turpentine
D. all the above.

View Answer

Question 410

Polymerization helps to improve the property of

A. strength
B. rigidity
C. elasticity
D. all of these.

View Answer

Question 411

Most commonly used solvent in oil paints, is

A. Petroleum
B. Spirit
C. Coal tar
D. Turpentine

View Answer

Question 412

Sewer pipes are made of

A. earthen ware
B. stone ware
C. refractory clay
D. terracota

View Answer

Question 413

A good building stone should not absorb water more than

A. 5 %
B. 10 %
C. 15 %
D. 20 %

View Answer

Question 414

Kaolin is chemically classified as

A. metamorphic rock
B. argillaceous rock
C. calcareous rock
D. silicious rock.

View Answer

Question 415

Higher pitch of the roofi) results in stronger roofii) results in weaker roofiii) requires more covering materialiv) requires less covering materialThe correct answer is

A. (i) and (iii)
B. (i) and (iv)
C. (ii) and (iii)
D. (ii) and (iv)

View Answer

Question 416

Quartzite is a

A. Metamorphic rock
B. Argillaceous rock
C. Calcareous rock
D. Siliceous rock

View Answer

Question 417

Smith's test of stones is performed to find out

A. The presence of soluble matter of stone
B. The compressive strength of the stone
C. The hardness of the stone
D. The toughness of the stone

View Answer

Question 418

The commonly used color pigment in paints, is

A. Ambers
B. Carbon black
C. Iron oxide
D. All the above

View Answer

Question 419

Bituminous fells are used for

A. Covering A.C. sheets
B. Covering sloping roofs
C. D.P.C.
D. None to these

View Answer

Question 420

Soundness test of cement determines

A. Quality of free lime
B. Ultimate strength
C. Durability
D. Initial setting

View Answer