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Materials and Construction MCQ Questions & Answers

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

Question 1

The metals occuring at the lower most position in the electromotive series

A. do not resist corrosion.
B. resist corrosion very strongly.
C. are very brittle.
D. are heat insulators.

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Question 2

The melleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the miximum malleability ?

A. Lead
B. Copper
C. Aluminium
D. Wrought iron

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Question 3

Shock resisting steels should possess high

A. hardness
B. toughness
C. tensile strength
D. wear resistance

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Question 4

Which of the following has the highest compressive strength ?

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

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Question 5

The main purpose of galvanising iron sheets is to

A. harden the surface.
B. increase its glossiness and lustre.
C. prevent the action of water.
D. prevent the action of oxygen.

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Question 6

Which of the following crystal structures characterises the austenitic stainless steel?

A. Simple hexagonal
B. Body centred cubic
C. Face centred cubic
D. None of these

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Question 7

The hardest material just prior to diamond in Mho's scale is

A. topax
B. carborundum
C. corrundum
D. calcite

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Question 8

The addition of antimony in tin-based alloys improves its

A. rupture strength and hot hardness.
B. impact strength and bonding strength.
C. deformation resistance.
D. wear resistance.

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Question 9

Chlorination of benzene is done to produce benzene hexachloride (a pesticide) in a photochemical reactor lined with

A. karbate
B. lead or glass
C. fireclay bricks

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Question 10

Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (l/20th of ordinary metals) ?

A. Invar
B. Constantan
C. Chromel
D. Alumel

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Question 11

Nickel (56%) and molybdenum (17%) alloys are called

A. monel
B. hastealloy C
C. inconel
D. bronzes

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Question 12

Liquid ammonia is shipped in __________ containers.

A. steel
B. aluminium
C. glass
D. lead lined

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Question 13

German silver used for decorative purposes contains maximum percentage of

A. silver
B. copper
C. zinc
D. nickel

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Question 14

Babbit metal used for bearings is a____base alloy.

A. tin
B. lead
C. aluminium
D. copper

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Question 15

Addition of __________ in steel can help in increasing the depth of hardness.

A. nickel
B. chromium
C. vanadium
D. tungsten

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Question 16

Percentage elongation of a material is a measure of its

A. ductility
B. brittleness
C. toughness
D. malleability

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Question 17

Aluminium as a material of construction suffers from the disadvantage of

A. very high cost.
B. rather low tensile strength.
C. very low strength to weight ratio.
D. scarce availability.

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Question 18

Sulphur melting pit in the sulphuric acid plant is made of

A. lead lined stainless steel.
B. cast iron.
C. steel or cement-brick lined.
D. hard wood.

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Question 19

Cast iron has very high

A. compressive strength
B. ductility
C. shock resistance
D. resistance to brittleness

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Question 20

Cermets are __________ materials.

A. refractory
B. reinforced
C. abrasive
D. fully metallic

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Question 21

18-4-1 high speed steel contains 18%, 4% and 1% respectively of

A. tungsten, vanadium and chromium
B. tungsten, chromium and vanadium
C. vanadium, chromium and tungsten
D. chromium, tungsten and vanadium

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Question 22

Cementite is

A. Fe3C chemically.
B. a compound of carbon and iron.
C. characterised by an orthorhombic crystal structure.
D. all (a), (b) and (c).

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Question 23

18/8 steel is a/an __________ stainless steel.

A. austenitic
B. ferritic
C. martensitic
D. none of these

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Question 24

Which of the following stainless steels is non-magnetic ?

A. Ferritic
B. Martensitic
C. Austenitic
D. None of these

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Question 25

Invar used in thermocouples is an alloy of nickel and

A. iron
B. copper
C. chromium
D. lead

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Question 26

The impure iron (pig iron) that is tapped out from blast furnace contains about __________ percent carbon.

A. 0.2
B. 2
C. 4
D. 8

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Question 27

Softness of silver can be converted into hardness by alloying it with small quantity of

A. copper & nickel
B. zinc
C. aluminium
D. tin

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Question 28

Dielectric strength of a material is

A. its energy stroage capacity.
B. a magnetic property.
C. its capacity to resist the flow of current.
D. its capacity to withstand high voltage.

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Question 29

Ceramic recuperators are generally made of

A. silicon carbide.
B. calcium carbide.
C. fireclay bricks.
D. high alumina bricks.

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Question 30

A suitable material of construction to use with fuming sulphuric acid is

A. carbon steel
B. stainless steel type 304
C. nickel
D. monel

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Question 31

Acetylene gas holder is made of

A. copper
B. cast iron
C. steel
D. monel metal

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Question 32

Residual magnetism in steel for magnets is increased by the addition of

A. nickel
B. cobalt
C. tungsten
D. chromium

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Question 33

Addition of __________ to the steel helps in increasing the residual magnetism in steel used for making magnets.

A. chromium
B. nickel
C. tungsten
D. cobalt

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Question 34

Austenitic manganese steel used for making jaws of crushing machines contains about __________ percent manganese.

A. 1.5-2
B. 3.5-4.5
C. 07-Sep
D. Dec-14

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Question 35

Refined acetic acid storage vessel are made of

A. copper
B. aluminium
C. high carbon steel
D. nickel

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Question 36

Coke oven regenerators are made of __________ bricks.

A. fire clay
B. silica
C. low thermal conductivity
D. high electrical conductivity

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Question 37

The behaviour of visco-elastic material is time dependent. This behaviour is common in __________ materials.

A. non-crystalline solid
B. crystalline
C. rubberry
D. non-crystalline organic polymeric.

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Question 38

German silver in an alloy of

A. copper, nickel and zinc.
B. copper, aluminium and silver.
C. silver, zinc and aluminium.
D. silver, nickel and zinc.

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Question 39

The purpose of nitriding the steel is to

A. harden its surface.
B. soften its surface.
C. improve its reliability.
D. none of these.

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Question 40

Zinc is not used

A. for producing zinc base die casting alloys.
B. in its oxide form as pigments.
C. as anode for corrosion prevention in boiler.
D. as an alloying element in various bronzes.

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Question 41

White cast iron is not

A. malleable
B. whitish in color
C. brittle
D. strong and hard

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Question 42

Heavy duty bearings are usually made of

A. white metal
B. phosphorous bronze
C. monel
D. zinc

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Question 43

Galvanised iron is

A. harder
B. protected from rusting
C. alumina coated iron
D. none of these

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Question 44

Caustic soda is produced in a mercury cell having anode and cathode made respectively of moving mercury and

A. moving mercury and graphite.
B. graphite and moving mercury.
C. moving mercury and carbon.
D. moving mercury and crimped steel wire.

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Question 45

Constituents of stellite are

A. zinc, copper and nickel.
B. cobalt, chromium and tungsten.
C. zinc, aluminium and nickel.
D. nickel, cobalt and vanadium.

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Question 46

Presence of nickel in steel improves its

A. corrosion resistance.
B. cutting ability.
C. wear resistance.
D. all (a), (b) and (c).

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Question 47

Hammers and railway rails are normally made of

A. mild steel
B. dead mild steel
C. medium carbon steel
D. high carbon steel

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Question 48

Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH)2. Lead pipes are readily corroded by

A. dilute HCI
B. acetic acid
C. concentrated H2SO4
D. none of these

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Question 49

Cast irons are generally specified by their

A. carbon content
B. tensile strength
C. hardness
D. manufacturing proces

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Question 50

Constantan is an alloy of

A. Cu (55%) & Sn (45%).
B. Cu (55%) & Ni (45%).
C. Pt (95%) & Rh (10%).
D. Fe (80%) & Ni (20%).

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