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
In a mortar, the binding material is
A. cement
B. sand
C. surkhi
D. cinder.
Question 2
Asbestos cement
A. is brittle
B. warps due to changes in humidity
C. strength is lowered when saturated by water
D. all the above.
Question 3
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.
Question 4
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.
Question 5
Brittleness of cold is due to an excess of
A. sulphur
B. carbon
C. phosphorus
D. silicon.
Question 6
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.
Question 7
Due to attack of dry rot, the timber
A. cracks
B. shrinks
C. reduces to powder
D. none of these.
Question 8
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.
Question 9
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.
Question 10
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.
Question 11
For preparing porcelains, the clay should be
A. sufficiently pure
B. of high degree of tanacity
C. of good plasticity
D. All the above.
Question 12
Galvanising means covering iron with a thin coat of
A. tin
B. zinc
C. glaze
D. coal tar.
Question 13
Gniess is obtained from
A. igneous rocks
B. metamorphic rocks
C. sedimentary rocks
D. sedimentary metamorphic rocks.
Question 14
Good quality stones must
A. be durable
B. be free from clay
C. resist action of acids
D. all the above.
Question 15
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.
Question 16
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.
Question 17
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.
Question 18
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.
Question 19
Kaolin is chemically classified as
A. metamorphic rock
B. argillaceous rock
C. calcareous rock
D. silicious rock.
Question 20
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.
Question 21
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.
Question 22
Pick up the hypabyssal rock from the following:
A. Granite
B. Dolerite
C. Basalt
D. All the above.
Question 23
Pick up the polymineralic rock from the following:
A. Quartz sand
B. Pure gypsum
C. Magnesite
D. Granite
Question 24
Polymerization helps to improve the property of
A. strength
B. rigidity
C. elasticity
D. all of these.
Question 25
Quartzite is a
A. metamorphic rock
B. argillaceous rock
C. calcareous rock
D. silicious rock.
Question 26
Sand stone is
A. sedimentary rock
B. metamorphic rock
C. igneous rock
D. volcanic rock.
Question 27
Sewer pipes are made of
A. earthen ware
B. stone ware
C. refractory clay
D. terracota
Question 28
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.
Question 29
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.
Question 30
The initial setting time of lime-pozzolana, is
A. 30 minutes
B. 60 minutes
C. 90 minutes
D. 120 minutes.
Question 31
The main constituent of fly-ash, is
A. aluminium oxide
B. silica
C. ferrous oxide
D. All of these.
Question 32
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.
Question 33
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.
Question 34
The rocks formed by gradual deposition, are called
A. sedimentary rocks
B. igneous rocks
C. metamorphic rocks
D. none of these.
Question 35
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.
Question 36
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.
Question 37
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.
Question 38
Ultimate strength to cement is provided by
A. Tricalcium silicate
B. Di-calcium silicate
C. Tri-calcium aluminate
D. Tetra calcium alumino ferrite.
Question 39
Vanadium steel is generally used for
A. railway switches and crossing
B. bearing balls
C. magnets
D. axles and springs.
Question 40
Varnish is a transparent or semi-transparent solution of resinuous substances in
A. alcohol
B. linseed
C. turpentine
D. all the above.
Question 41
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.
Question 42
Wrought iron contains carbon upto
A. 0.25%
B. 1.00%
C. 1.50%
D. 2%.
Question 43
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 %
Question 44
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 %
Question 45
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
Question 46
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
Question 47
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
Question 48
Asbestos is
A. Corrugated sheet used for roofing
B. An incombustible fire proof material
C. An organic substance
D. All the above
Question 49
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
Question 50
The stone suitable for rubble masonry should be.
A. Hard
B. Tough
C. Heavy
D. Light
Question 51
The filler used in plastic bitumen, is
A. Shale powder
B. Talc powder
C. Asbestos powder
D. Plastic powder
Question 52
Softer variety of steel may be obtained by
A. Cementation process
B. Crucible process
C. Bessemer process
D. Open hearth process
Question 53
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 %
Question 54
A good building stone should not absorb water more than
A. 5 %
B. 10 %
C. 15 %
D. 20 %
Question 55
Basalt is
A. Sedimentary rock
B. Metamorphic rock
C. Extrusive igneous rock
D. Intrusive igneous rock
Question 56
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
Question 57
Which one of the following is an air binding material?
A. Gypsum
B. Acid-resistant cement
C. Quick lime
D. All of these
Question 58
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
Question 59
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
Question 60
Blister steel
A. Is obtained by cementation process
B. Is full of fissures and cavities
C. Can be easily welded
D. All the above
Question 61
Cast iron contains carbon approximately
A. 1.5% to 5.5%
B. 0.05% to 1.75%
C. 0.250 %
D. None to these
Question 62
Steel contains carbon approximately
A. 1.50% to 5.6%
B. 0.05% to 1.75%
C. 0.25 %
D. None to these
Question 63
Fibre boards can be
A. Distempered
B. Painted
C. Painted and distempered
D. Used for furniture
Question 64
The process of mixing clay, water and other ingredients to make brick is known as
A. Kneading
B. Moulding
C. Pugging
D. Drying
Question 65
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
Question 66
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
Question 67
Soundness test of cement determines
A. Quality of free lime
B. Ultimate strength
C. Durability
D. Initial setting
Question 68
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
Question 69
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
Question 70
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
Question 71
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
Question 72
Second class bricks
A. Are of dark brown color
B. Produce a metallic sound when struck
C. Are well burnt
D. Are under burnt
Question 73
The coefficient of hardness of stones used in road work should be greater than
A. 10
B. 12
C. 15
D. 17
Question 74
The normal consistency of ordinary Portland cement is about
A. 10 %
B. 20 %
C. 30 %
D. 40 %
Question 75
The rock generally used for roofing, is
A. Granite
B. Basalt
C. Slate
D. Pumice
Question 76
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
Question 77
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
Question 78
Duco paints are
A. Plastic paints
B. Cellulose paints
C. Emulsion paints
D. Oil paints
Question 79
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
Question 80
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
Question 81
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
Question 82
The method of addition polymerization is used for obtaining:
A. Polystyrene
B. Polypropylene
C. Polyvinylchloride
D. All of these
Question 83
The hardest rock is
A. Marble
B. Diamond
C. Talc
D. Quartz
Question 84
A heavy stone is suitable for
A. Arches
B. Rubble masonry
C. Roads
D. Retaining walls
Question 85
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
Question 86
For obtaining vinyl chloride acetate, the method used, is
A. Addition polymerization
B. Condensation polymerization
C. Co-polymerization
D. None of these
Question 87
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
Question 88
Snowcrete is one of the patent forms of
A. Distempers
B. Water proof cement paints
C. Enamel paints
D. Cellulose paints
Question 89
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
Question 90
The softest rock is
A. Marble
B. Diamond
C. Talc
D. Quartz
Question 91
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
Question 92
Bituminous fells are used for
A. Covering A.C. sheets
B. Covering sloping roofs
C. D.P.C.
D. None to these
Question 93
Brittleness of cold is due to an excess of
A. Sulphur
B. Carbon
C. Phosphorus
D. Silicon
Question 94
The moisture content in a well seasoned timber is
A. 4 % to 6 %
B. 10 % to 12 %
C. 15 % to 20 %
D. 100 %
Question 95
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
Question 96
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
Question 97
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)
Question 98
Mastic asphalt is generally used for
A. Damp proof course
B. Water proof layer
C. Partition walls
D. Both (A) and (B)
Question 99
Vanadium steel is generally used for
A. Railway switches and crossing
B. Bearing balls
C. Magnets
D. Axles and springs
Question 100
Plastic bitumen is generally used for
A. Road pavements
B. Expansion joints
C. Crack fillings
D. None to these
Question 101
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
Question 102
Lime concrete is generally used for
A. Wall foundations
B. Flooring at ground level
C. Both (A) and (B)
D. Neither (A) nor (B)
Question 103
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
Question 104
The commonly used color pigment in paints, is
A. Ambers
B. Carbon black
C. Iron oxide
D. All the above
Question 105
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
Question 106
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
Question 107
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
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
Question 109
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
Question 110
The harmonious mixing of the clay ingredients, is known as
A. Weathering
B. Blending
C. Tempering
D. None of these
Question 111
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
Question 112
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
Question 113
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
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
Question 115
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
Question 116
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)
Question 117
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
Question 118
The base material for distemper, is
A. Chalk
B. Lime
C. Lime putty
D. Cement wash
Question 119
Which one of the following polymers is obtained from condensation polymerization?
A. Phenol formaldehyde
B. Carbamide
C. Melamine-formaldehyde
D. All of these
Question 120
The rocks in which argil (or clay) predominates, are called
A. Siliceous rocks
B. Argillaceous rocks
C. Calcareous rocks
D. Igneous rocks
Question 121
The trunk of tree left after cutting all the branches is known as
A. Log
B. Batten
C. Plank
D. Baulk
Question 122
A badly mixed cement concrete results in
A. Segregation
B. Bleeding
C. Honey combing
D. None of these
Question 123
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
Question 124
The commonly used base for iron and steel work, is
A. Red lead
B. Zinc white
C. White lead
D. Titanium white
Question 125
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
Question 126
In a mortar, the binding material is
A. Cement
B. Sand
C. Surkhi (brick-dust)
D. Cinder
Question 127
Lime mortar is generally made with
A. Quick lime
B. Fat lime
C. Hydraulic lime
D. Plain lime
Question 128
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
Question 129
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
Question 130
Expansion Joints in masonry walls are provided in wall lengths usater than
A. 10 m
B. 20 m
C. 30 m
D. 40 m
Question 131
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
Question 132
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
Question 133
The age of a tree can be known by examining
A. Cambium layer
B. Annular rings
C. Medullary rays
D. Heart wood
Question 134
Ultimate strength to cement is provided by
A. Tri-calcium silicate
B. Di-calcium silicate
C. Tri-calcium aluminate
D. Tetra calcium alumino ferrite
Question 135
The main constituent of fly-ash, is
A. Aluminium oxide
B. Silica
C. Ferrous oxide
D. All of these
Question 136
The most important constituent of varnish, is
A. Drier
B. Solvent
C. Resin
D. All the above
Question 137
Stones used for ornamental work must be
A. Soft
B. Hard
C. Light
D. Heavy
Question 138
Red short iron cracks when bent due to the presence of
A. Sulphur
B. Carbon
C. Phosphorus
D. Silicon
Question 139
Forge pig may be converted to wrought iron by
A. Rolling
B. Pudding
C. Shingling
D. Refining
Question 140
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
Question 141
Which of the following should be used for hearting of thicker walls?
A. Headers
B. Stretchers
C. Brick bats
D. Queen closer
Question 142
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
Question 143
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
Question 144
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
Question 145
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
Question 146
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
Question 147
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
Question 148
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
Question 149
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
Question 150
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
Question 151
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
Question 152
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
Question 153
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
Question 154
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
Question 155
Pick up the volcanic rock from the following:
A. Granite
B. Dolerite
C. Basalt
D. All the above
Question 156
Pick up the hypabyssal rock from the following:
A. Granite
B. Dolerite
C. Basalt
D. All the above
Question 157
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
Question 158
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
Question 159
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
Question 160
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
Question 161
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
Question 162
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
Question 163
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
Question 164
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
Question 165
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
Question 166
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
Question 167
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
Question 168
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
Question 169
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
Question 170
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
Question 171
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
Question 172
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
Question 173
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
Question 174
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
Question 175
After storage, the strength of cement
A. Decreases
B. Increases
C. Remains same
D. May increase or decrease
Question 176
Bitumen emulsion is
A. A liquid containing bitumen in suspension
B. A paint
C. Used as anti-corrosive paint
D. All the above
Question 177
The steel used for the manufacture of rails, is
A. Bessemer steel
B. Mild steel
C. Cast steel
D. Stainless steel
Question 178
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
Question 179
The most durable varnish is
A. Water varnish
B. Spirit varnish
C. Turpentine varnish
D. Oil varnish
Question 180
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
Question 181
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
Question 182
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
Question 183
Turpentine oil is used in paints as
A. Thinner
B. Vehicle
C. Base
D. Drier
Question 184
Linseed oil is used in paints as
A. Thinner
B. Vehicle
C. Base
D. Drier
Question 185
The pigment used in paints for corrosive resistance, is
A. White lead
B. Ferrous oxide
C. Zinc white
D. Red lead
Question 186
The type of steel used for precision levelling staff, is
A. Titanium steel
B. Carbon steel
C. Invar
D. Stainless steel
Question 187
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
Question 188
Good quality sand is never obtained from
A. River
B. Lake
C. Sea
D. Gravel powder
Question 189
Water paint is a
A. White wash
B. Color wash
C. Whiting
D. All the above
Question 190
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 %
Question 191
The commonly used lime in white washing, is
A. White lime
B. Fat lime
C. Hydraulic lime
D. Quick lime
Question 192
Plywood is made from
A. Common timber
B. Bamboo fibre
C. Teak wood only
D. Asbestos sheets
Question 193
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
Question 194
Bitumen may be dissolved in
A. Carbondioxide
B. Water
C. Sodium chloride
D. Carbon disulphide
Question 195
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
Question 196
Due to attack of dry rot, the timber
A. Cracks
B. Shrinks
C. Reduces to powder
D. None of these
Question 197
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
Question 198
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
Question 199
Commonly used thinner in
A. Lacquer paints, is alcohol
B. Cellulose paints is ethyl acetate
C. Oil paints, is naphtha
D. All the above
Question 200
Which of the following trees yields hard wood?
A. Deodar
B. Chir
C. Shishum
D. Pine
Question 201
The practical limit of moisture content achieved in air drying of timber is
A. 5 %
B. 15 %
C. 25 %
D. 35 %
Question 202
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)
Question 203
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
Question 204
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
Question 205
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
Question 206
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
Question 207
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
Question 208
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
Question 209
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
Question 210
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
Question 211
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
Question 212
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
Question 213
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
Question 214
Pick up the synthetic resin from the following:
A. Urea resin
B. Phenolic resin
C. Resorcinol resin
D. All of these
Question 215
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
Question 216
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
Question 217
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
Question 218
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
Question 219
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
Question 220
Quartzite is a
A. Metamorphic rock
B. Argillaceous rock
C. Calcareous rock
D. Siliceous rock
Question 221
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
Question 222
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
Question 223
Quick lime is
A. Calcium carbonate
B. Calcium oxide
C. Calcium hydroxide
D. None of the above
Question 224
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
Question 225
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
Question 226
Spirit varnish generally consists of
A. Oil, wax and resin
B. Alcohol, wax and turpentine
C. Pigment and synthetic resin
D. Spirit and shellac
Question 227
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
Question 228
Plastics are compounds of carbon with element
A. Hydrogen
B. Nitrogen
C. Oxygen
D. All of these
Question 229
The most commonly used retarder in cement is
A. Gypsum
B. Calcium chloride
C. Calcium carbonate
D. None of the above
Question 230
The cement becomes unsound by the presence of excess
A. Sulphur
B. Magnesia
C. Lime
D. All of these
Question 231
Resins are
A. Not soluble in water
B. Soluble in spirit
C. Used in varnishes
D. Left behind on evaporation of oil
Question 232
Which of the following ingredients of the brick earth enables the brick to retain its shape?
A. Alumina
B. Silica
C. Iron
D. Magnesia
Question 233
Strength of cement concrete primarily depends upon
A. Quality of water
B. Quantity of aggregate
C. Quantity of cement
D. Water-cement ratio
Question 234
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
Question 235
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
Question 236
The main ingredients of Portland cement are
A. Lime and silica
B. Lime and alumina
C. Silica and alumina
D. Lime and iron
Question 237
Jumper is a tool used for
A. Testing of stones
B. Quarrying of stones
C. Dressing of stones
D. None of the above
Question 238
Durability of building stone is affected by its
A. Chemical composition
B. Texture
C. Resistance to atmosphere
D. All the above
Question 239
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
Question 240
According to ISI, bitumen is classified into
A. 2 grades
B. 4 grades
C. 8 grades
D. 10 grades
Question 241
Cast steel is manufactured by
A. Cementation process
B. Crucible process
C. Bessemer process
D. Open hearth process
Question 242
A good quality stone absorbs water less than
A. 5 %
B. 10 %
C. 15 %
D. 25 %
Question 243
A stone is rejected if it absorbs water more than
A. 5 %
B. 10 %
C. 15 %
D. 20 %
Question 244
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
Question 245
Sand stone is
A. Sedimentary rock
B. Metamorphic rock
C. Igneous rock
D. Volcanic rock
Question 246
Seasoning is
A. A process of removing sap
B. Creosoting
C. Painting with sodium silicate
D. Coating with tar
Question 247
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
Question 248
Seasoning of timber is essential to remove
A. Knots from timber
B. Sap from timber
C. Twisted fibre from timber
D. Roughness of timber
Question 249
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
Question 250
Shingle is
A. Decomposed laterite
B. Crushed granite
C. Water bound pebbles
D. Air weathered rock
Question 251
Brass is an alloy of
A. Copper and zinc
B. Zinc and lead
C. Tin and silver
D. Zinc and nickel
Question 252
The most fire resistant paints are:
A. Enamel paints
B. Aluminium paints
C. Asbestos paints
D. Cement paints
Question 253
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
Question 254
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
Question 255
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
Question 256
The stones obtained by blasting are used as
A. Ballast in railways
B. Aggregates for concrete
C. Road metal
D. All the above
Question 257
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
Question 258
Sea sand used in structures causes
A. Dampness
B. Efflorescence
C. Disintegration
D. All of these
Question 259
Cross cut saw is used for
A. Cutting soft stones
B. Cutting hard stones
C. Cutting large blocks of stones
D. Dressing stones
Question 260
Wrought iron contains carbon upto
A. 0.25 %
B. 1.0 %
C. 1.5 %
D. 2.0 %
Question 261
Which of the following sedimentary rocks changes into quartzite by metamorphic action?
A. Sand stone
B. Lime stone
C. Shale
D. Gypsum
Question 262
Non acid-resistant asbestos is:
A. Tremolite asbestos
B. Chrysotile asbestos
C. Amosite asbestos
D. None of these
Question 263
Bitumen completely dissolves in
A. Carbon bisulphide
B. Chloroform
C. Coal tar
D. All of these
Question 264
Galvanising means covering iron with a thin coat of
A. Tin
B. Zinc
C. Glaze
D. Coal tar
Question 265
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
Question 266
French polish is
A. Oil paint
B. Distemper
C. Spirit varnish
D. None to these
Question 267
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
Question 268
Rapid hardening cement contains
A. Tri-calcium silicate
B. Tri-calcium aluminate
C. Tetra-calcium alumino-ferrite
D. Di-calcium silicate
Question 269
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
Question 270
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
Question 271
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
Question 272
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
Question 273
Gypsum is a
A. Mechanically formed sedimentary rock
B. Igneous rock
C. Chemically precipitated sedimentary rock
D. Metamorphic rock
Question 274
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
Question 275
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
Question 276
For preparing porcelains, the clay should be
A. Sufficiently pure
B. Of high degree of tenacity
C. Of good plasticity
D. All the above
Question 277
Bessemer process is used for the manufacture of
A. Pig iron
B. Cast iron
C. Wrought iron
D. Steel
Question 278
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
Question 279
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
Question 280
Good quality cement contains higher percentage of
A. Tri-calcium silicate
B. Di-calcium silicate
C. Tri-calcium aluminate
D. Tetra calcium alumino ferrite
Question 281
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
Question 282
The most commonly used synthetic abrasive is
A. Aluminium carbide
B. Boric acid
C. Silicon
D. All of these
Question 283
The main constituent which imparts hydraulicity to hydraulic lime is
A. Calcium oxide
B. Silica
C. Clay
D. Water
Question 284
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)
Question 285
For one cubic metre of brick masonry, number of bricks required, is
A. 400
B. 425
C. 450
D. 500
Question 286
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
Question 287
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
Question 288
Seasoning of timber is done for
A. Increasing moisture content
B. Decreasing moisture content
C. Increasing strength of timber
D. None to these
Question 289
The initial setting time of lime-pozzolana, is
A. 30 minutes
B. 60 minutes
C. 90 minutes
D. 120 minutes
Question 290
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
Question 291
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
Question 292
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 %
Question 293
The commonly used thinner in oil paints, is
A. Naphtha
B. Turpentine
C. Both (a) and (b)
D. None the these
Question 294
Most commonly used solvent in oil paints, is
A. Petroleum
B. Spirit
C. Coal tar
D. Turpentine
Question 295
Plaster of Paris is obtained by calcining
A. Bauxite
B. Gypsum
C. Lime stone
D. None of these
Question 296
Which of the following is a mineral?
A. Basalt
B. Granite
C. Quartz
D. Syenite
Question 297
Which of the following timbers is suitable for making sports goods?
A. Mulberry
B. Mahogany
C. Sal
D. Deodar
Question 298
Stones used for the construction of retaining walls must be
A. Soft
B. Hard
C. Light
D. Heavy
Question 299
Invar contains
A. 12% of nickel
B. 24% of nickel
C. 30% of nickel
D. 36% of nickel
Question 300
Calcination of iron ores is done
A. To remove moisture
B. To remove carbonic acid
C. By roasting in heaps
D. All the above
Question 301
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
Question 302
The foliated structure is very common in
A. Sedimentary rocks
B. Igneous rocks
C. Metamorphic rocks
D. None of these
Question 303
The rocks formed by gradual deposition, are called
A. Sedimentary rocks
B. Igneous rocks
C. Metamorphic rocks
D. None of these
Question 304
The specific gravity of marble, is
A. 2.5
B. 2.6
C. 2.66
D. 2.72
Question 305
Jhumb bricks are
A. Under burnt
B. Over burnt
C. Kutcha
D. None of these
Question 306
A bull nose brick is not used for
A. Rounding off sharp corners
B. Pillars
C. Decoration purpose
D. Arches
Question 307
The lime which contains mainly calcium oxide and slacks with water, is
A. Fat lime
B. Quick lime
C. Hydraulic lime
D. Poor lime
Question 308
Lacquer is
A. Oil paint
B. Distemper
C. Spirit varnish
D. None to these
Question 309
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
Question 310
Laterite is a/an
A. Volcanic rock
B. Argillaceous rock
C. Calcareous rock
D. Siliceous rock
Question 311
The fire clay contains pure
A. Lime
B. Oxide of iron
C. Hydrated aluminium silicate
D. Magnesium
Question 312
Generally wooden moulds are made from
A. Ply wood
B. Shishum wood
C. Deodar wood
D. Teak wood
Question 313
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
Question 314
Kaolin is chemically classified as
A. Metamorphic rock
B. Argillaceous rock
C. Calcareous rock
D. Siliceous rock
Question 315
Bitumen is generally obtained from
A. Organic material
B. Synthetic material
C. Petroleum product
D. Coal
Question 316
Which of the following is a rock?
A. Quartz
B. Mica
C. Gypsum
D. None of the above
Question 317
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
Question 318
Manganese steels
A. Are non-magnetic
B. Possess high electrical resistance
C. Possess low coefficient of expansion
D. All the above
Question 319
Mastic asphalt is
A. Water proof
B. Fire proof
C. Elastic
D. All the above
Question 320
Based on its dry weight, a freshly felled tree may contain water
A. 25 %
B. 50 %
C. 75 %
D. 100 %
Question 321
The most commonly used base for timber painting, is
A. Red lead
B. Zinc white
C. White lead
D. Titanium white
Question 322
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
Question 323
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
Question 324
Lime stone is not a
A. Sedimentary rock
B. Stratified rock
C. Aqueous rock
D. Metamorphic rock
Question 325
Soundness of cement is tested by
A. Vicat's apparatus
B. Le-chatelier apparatus
C. Compressive strength testing apparatus
D. None of these
Question 326
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
Question 327
Slate is formed by metamorphic action on
A. Shale
B. Lime stone
C. Sand stone
D. Granite
Question 328
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
Question 329
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
Question 330
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
Question 331
Iron ore may contain
A. Carbon
B. Silicon
C. Phosphorus and manganese
D. All the above
Question 332
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
Question 333
Gypsum consists of
A. H₂S and CO₂
B. CaSO4 and H₂O
C. Lime and H₂O
D. CO₂ and calcium
Question 334
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°
Question 335
The most important constituent of an oil paint, is
A. Thinner
B. Vehicle
C. Pigment
D. All the above
Question 336
Stucco paints are suitable for
A. Stone masonry
B. Brick walls
C. Both (A) and (B)
D. Neither (A) nor (B)
Question 337
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
Question 338
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
Question 339
Number of bricks required for one cubic metre of brick masonry is
A. 400
B. 450
C. 500
D. 550
Question 340
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
Question 341
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
Question 342
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
Question 343
Addition of pozzolana to ordinary Portland cement increases
A. Bleeding
B. Shrinkage
C. Permeability
D. Heat of hydration
Question 344
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
Question 345
Which of the following has more fire resisting characteristics?
A. Marble
B. Lime stone
C. Compact sand stone
D. Granite
Question 346
Which of the following metamorphic rocks has the most weather resisting characteristics?
A. Marble
B. Quartzite
C. Slate
D. Lime stone
Question 347
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
Question 348
Stainless steel resists corrosion due to
A. Carbon
B. Sulphur
C. Vanadium
D. Chromium
Question 349
Chlorite, a green colour mineral is mainly derived from the decomposition of
A. Augite
B. Biotite
C. Hornblende
D. All of these
Question 350
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
Question 351
Bitumen felt is used for
A. Water proofing
B. Damp proofing
C. Both (A) and (B)
D. Neither (A) nor (B)
Question 352
A ferrous metal is
A. Cast iron
B. Wrought iron
C. Steel
D. All the above
Question 353
Wrought iron is manufactured from pig iron by
A. Refining
B. Pudding
C. Shingling
D. All the above
Question 354
Pig iron is manufactured from the ores by
A. Dressing
B. Calcination and roasting
C. Smelting
D. All the above
Question 355
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)
Question 356
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
Question 357
Wrought iron is used for
A. Structural works in beams
B. Small sized water pipes
C. Columns and struts
D. None to these
Question 358
Cast iron is used for
A. Structural works in beams
B. Small sized water pipes
C. Columns and struts
D. None to these
Question 359
Bulking of sand is caused due to
A. Surface moisture
B. Air voids
C. Viscosity
D. Clay contents
Question 360
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
Question 361
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
Question 362
Gneiss is obtained from
A. Igneous rocks
B. Metamorphic rocks
C. Sedimentary rocks
D. Sedimentary metamorphic rocks
Question 363
Asphalt is obtained from
A. Petroleum distillation
B. Bitumen distillation
C. Plastic distillation
D. None of these
Question 364
The normal curing period for lime mortar, is:
A. 1 day
B. 3 days
C. 7 days
D. 10 days
Question 365
Glazing is used to make earthenware
A. hard
B. soft
C. porous
D. impervious
Question 366
Pug mill is used for
A. Preparation of clay
B. Moulding of clay
C. Drying of bricks
D. Burning of bricks
Question 367
A pug mill is used for
A. Softening brick earth
B. Moulding brick earth
C. Tempering brick earth
D. Providing brick earth
Question 368
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
Question 369
Clay and silt content in a good brick earth must be at least
A. 50 %
B. 40 %
C. 30 %
D. 25 %
Question 370
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
Question 371
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
Question 372
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
Question 373
The slenderness ratio for masonry walls should not be more than
A. 10
B. 20
C. 30
D. 40
Question 374
For construction of structures under water, the type of lime used, is
A. Hydraulic lime
B. Fat lime
C. Quick lime
D. Pure lime
Question 375
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
Question 376
Inner part of a timber log surrounding the pitch, is called
A. Sapwood
B. Cambium layer
C. Heart wood
D. None to these
Question 377
For high grade instruments the steel preferred to, is
A. Cast steel
B. Bessemer steel
C. Mild steel
D. Whitworth compressed steel
Question 378
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
Question 379
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
Question 380
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
Question 381
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)
Question 382
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
Question 383
For a good building stone, its specific gravity should the greater than
A. 1.5
B. 1.7
C. 2.2
D. 2.7
Question 384
In arches, stratified stones are placed so that their planes are
A. Parallel
B. Perpendicular
C. Radial
D. None of these
Question 385
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
Question 386
To give a brilliant finish, the type of varnish used, is
A. Water varnish
B. Spirit varnish
C. Turpentine varnish
D. Oil varnish
Question 387
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
Question 388
Percentage content of silica in window glass, is
A. 40 to 45
B. 50 to 55
C. 60 to 65
D. 70 to 75
Question 389
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
Question 390
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
Question 391
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
Question 392
The tendency of a stone is, to split along:
A. Texture
B. Fracture
C. Cleavage
D. Structure
Question 393
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
Question 394
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
Question 395
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
Question 396
The usual percentages of clay and metal in cermet are:
A. 50%, 50%
B. 60%, 40%
C. 70%, 30%
D. 80%, 20%
Question 397
Good quality stones must
A. Be durable
B. Be free from clay
C. Resist action of acids
D. All the above
Question 398
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
Question 399
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
Question 400
Chemically, marble is known as
A. Metamorphic rock
B. Argillaceous rock
C. Calcareous rock
D. Siliceous rock
Question 401
Geologically, marble is known as
A. Sedimentary rock
B. Igneous rock
C. Metamorphic rock
D. Stratified rock
Question 402
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
Question 403
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
Question 404
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
Question 405
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
Question 406
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
Question 407
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)
Question 408
The commonly used drying oil for oil paints, is
A. Olive oil
B. Linseed oil
C. Kerosene oil
D. Acetate of lead
Question 409
Formula for quick lime, is
A. CaCO₃
B. Ca(OH)₂
C. CO₃CO₂
D. None to these
Question 410
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
Question 411
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
Question 412
Refractory bricks resist
A. High temperature
B. Chemical action
C. Dampness
D. All the above
Question 413
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
Question 414
Crushing strength of a good building stone should be more than
A. 50 MPa
B. 100 MPa
C. 150 MPa
D. 200 MPa
Question 415
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
Question 416
The vehicle used in case of enamel paints is usually
A. Linseed oil
B. Water
C. Varnish
D. None of the above
Question 417
Which one of the following is used for preparing porcelain?
A. Clay
B. Feldspar
C. Quartz
D. All of these
Question 418
Which of the following gradients exerts maximum influence on properties of steel?
A. iron
B. carbon
C. manganese
D. sulphur
Question 419
Sewer pipes are made of
A. Earthen ware
B. Stone ware
C. Refractory clay
D. All the above
Question 420
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