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1. Ductility of a material can be defined as

(a) ability to undergo large permanent deformations in compression

(b) ability to recover its original form

(c) ability to undergo large permanent deformations in tension

(d) all of the above

(e) none of the above.

Ans: c

2. Malleability of a material can be defined as

(a) ability to undergo large permanent deformations in compression

(b) ability to recover its original form

(c) ability to undergo large permanent deformations in tension(d) all of the above


Ans: a

3. n compression! a prism of brittle material "ill brea#

(a) by forming a bulge (l$) by shearing along obli%ue plane

(c) in direction perpend cular to application of load

(d) by crushing into thousands of pieces


Ans: b

&. 'he ability of a material to resist softening at high temperature is #no"n as

(a) creep

(b) hot tempering

(c) hot hardness

(d) fatigue

(e) super hardening.

Ans: c



. Mild steel belongs to the follo"ing category

(a) lo" carbon steel

(b) medium carbon steel

(c) high carbon steel

(d) alloy steel

(e) special steel.

Ans: a

. 'he ultimate tensile strength of lo" carbon steel by "or#ing at a high strain rate "ill

(a) decrease

(b) increase

(c) remain constant(d) first increase and then decrease

(e) first decrease and then increase.

Ans: b

*. +lo" plastic defoliation of metals under a constant stress is #no"n as

(a) creep

(b) fatigue

(c) endurance

(d) plastic deformation

(e) non,plastic deformation.

Ans: a

-. 'he ultimate tensile strength and yield strength of most of the metals! "hen temperature falls

from to l/0 "ill

(a) increase

(b) decrease

(c) remain same

(d) first increase and then decrease

(e) sho" unpredictable behavior.

Ans: a

. 'he number of electrons in 1 cm3 of metal "ould be of the order of

(a) 11



(b)'1

(c) 122

(d) 1&

(e) 12

Ans: c

1. +tress relaation is, the phenomenon

(a) in "hich parts are not loaded

(b) in "hich stress remains constant on increasing load

(c) in "hich deformation tends to loosen the 4oint and produces a stress reduced

(d) stress reduces on increasing load


Ans: c

ll. 'he elastic stress strain behavior of rubber is

(a) linear

(b) non,linear

(c) plastic

(d) no fied relationship

(e) unpredictable behavior.

Ans: b

12. sotropic materials are those "hich have the same

(a) elastic properties in all directions

(b) stresses induced in all directions

(c) thermal properties in all directions

(d) electric and magnetic properties in all directions

(e) density throughout.

Ans: a

13. 5ecrystalli6ation temperature is one

(a) at "hich crystals first start forming from molten metal "hen it is cooled

(b) at "hich ne" spherical crystals first begin to form from the old deformed one "hen a strained

metal is heated

(c) at "hich change of allotropic form ta#es place

(d) at "hich crystals gro" bigger in si6e

(e) at "hich crystals are destroyed on heating.



Ans: b

1&. 7oints of arrest for iron correspond to

(a) stages at "hich allotropic forms change

(b) stages at "hich further heating does not increase temperature for some time

(c) stages at "hich properties do not change "ith increase in temperature

(d) there is nothing li#e points of arrest


Ans: a

1. Delta iron occurs at temperature of

(a) room temperature

(b) above melting point

(c) bet"een 1&/0 and 13/0(c) bet"een 1/0 and 1&/0


Ans: c

1. A material is #no"n as allotropic or polymorphic if it

(a) has a fied structure under all conditions

(b) eists in several crystal forms at different temperatures

(c) responds to heat treatment

(d) has its atoms distributed in a random pattern


Ans: b

1*. +uper conduction by metals is observed in the temperature range of

(a) belo" 1/8

(b) above 1/8

(c) around /0

(d) around 1/0

(e) above 1/0.

Ans: a

1-. 9hich of the follo"ing constituents of steels is softest and least strong

(a) austenite

(b) pearlite



(c) ferrite

(d) cementlte

(e) bainite.

Ans: c

1. 9hich of the follo"ing represents the allotropic forms of iron

(a) alpha iron! beta iron and gamma iron

(b) alpha iron and beta iron

(c) body centered cubic a,iron and face centered cubic a,iron

(d) alpha iron! gamma from and delta iron


Ans: d

2. 'he follo"ing types of materials are usually the most ductile(a) face,centred cubic lattice

(b) body,centred cubic lattice

(c) heagonal close,pac#ed lattice



Ans: a

21. 7ure iron is the structure of

(a) ferrite

(b) pearlite

(c) anstenite

(d) ferrite and cementite

(e) ferrite and pearlite.

Ans: a

22. 'he temperature at "hich ferromagnetic alpha iron transforms to paramagnetic alpha iron is

(a) **/0

(b) 1/0

(c) 1/0

(d) belo" recrystalli6ation temperature

(e) above recrystalli6ation temperature.

Ans: a



23. amma iron eits at follo"ing temperature

(a) room temperature

(b) near melting point

(c) bet"een 1&/0 and 13/0

(d) bet"een 1/0 and 1&/0


Ans: d

2&. ;erromagnetic alpha iron eists in temperature range of

(a) belo" *23/0

(b) ** , 1/0

(c) 1,1&&/0

(d) 1&,13/0

(e) above 13/0.Ans: a

2. 7aramagnetic alpha iron changes to gamma iron at

(a) **/0

(b) 1/0

(c) 1&&/0

(d) 13/0


Ans: b

2. A reversible change in the atomic structure of steel "ith corresponding change in the

properties is #no"n as

(a) molecular change

(b) physical change

(c) allotropic change

(d) solidus change

(e) atomic change.

Ans: c

2*. 'he molecules in a solid move

(a) in a random manner

(b) in a hapha6ard "ay

(c) in circular motion



(d) bac# and forth li#e tiny pendulums

(e) do not move.

Ans: d

2-. 'he crystal structure of gamma iron is

(a) body centred cubic

(b) face centred cubic

(c) heagonal close pac#ed

(d) cubic structure

(e) orthorhombic crystal.

Ans: b

2. 'he crystal of alpha iron is

(a) body centred cubic(b) face centred cubic


(d) cubic structure


Ans: a

3. 'he metallic structure of mild steel is

(a) body centred cubic

(b) face centred cubic


(d) cubic structure


Ans: a

31. ;or the allotropic forms of iron! the points of arrest are

(a) the points "here no further change occurs

(b) constant for all metals

(c) the points "here there is no further flo" of metal

(d) the points of discontinuity

(e) the points "here ma4or changes ta#e place.

Ans: d

32. 'he percentage of carbon in pig iron varies from



(a) .1 to 1.2teristics

(b) improvement of corrosion resistance

(c) one of the best #no"n age and precipitation,hardening systems

(d) improving machinability


Ans: b

1*2. Clinvar! an alloy used in precision instruments! hair springs for "atches! etc. contains the

follo"ing element as principal alloying element

(a) iron(b) copper

(c) aluminium

(d) 6inc

(e) nic#el.

Ans: e

1*3. 9hich of the follo"ing alloys does not have copper as one of the constituents

(a) delta metal

(b) monel metal

(c) constantan

(d) nichrome

(e) silicon bron6e.

Ans: d

1*&. Addition of lead and bismuth to aluminium results in

(a) improvement of casting characteristics





Ans: d

1*. Addition of silicon to aluminium results in


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(a) improvement of casting characteristics





Ans: a

1*. 0onstantant an alloy used in thermocouples is an alloy of

(a) copper and tin

(b) copper and 6inc

(c) copper and iron

(d) copper and nic#el

(e) copper and chromium.

Ans: d

1**. 9hite metal contains

(a) 3 to *< nic#el and 3< copper

(b) --< copper and 1< tin and rest 6inc

(c) alloy of tin! lead and cadmium

(d) silver and chromium

(e) malleable cast iron and silver.

Ans: c

1*-. erman silver contains

(a) 1< silver

(b) 2.< silver

(c) < silver

(d) 1< silver

(e) 1< silver.

Ans: c

1*. 9hich of the follo"ing has highest specific strength of all structural materials

(a) magnesium alloys

(b) titanium alloys

(c) chromium alloys

(d) magnetic steel alloys




Ans: b

1-. Do" metal contains

(a) &< aluminium! &< copper and .< Mn! Mg! +i and ;e

(b) 2.< aluminium and! &< copper! 2< nic#el and 1.< Mg

(c) K < aluminium and < copper

(d) < magnesium and < aluminium "ith some copper

(e) < magnesium and 1< tin.

Ans: d

1-1. ;oundry crucible is made of

(a) mild steel

(b) german silver

(c) lead(d) cast iron

(e) graphite.

Ans: e

1-2. Age,hardening is related "ith

(a) stainless steel

(b) gun metal

(c) german silver

(d) duralumin

(e) cast iron.

Ans: d

1-3. Aluminium bron6e contains

(a) &< aluminium! &< copper and .< Mn! Mg! +i and ;e

(b) 2.< aluminium! &< copper! 2< nic#el! and 1.< Mg

(c) 1< aluminium and < copper


(e) 1< aluminium and < tin.

Ans: c

1-&. abbit metal is a

(a) lead base alloy

(b) tin base alloy



(c) copper base alloy


(e) (a) and (c) above.

Ans: e

1-. 'he correct composition of abbit metal is

(a) -*.*< +n! &< 0u! -< +b! .2< i

(b) < +n! 2< 0u! &< +b! 2< i! 2< Mg

(c) -*< +n! &< 0u! -< +b! 1< Al

(d) -2< +n! &< 0u! -< +b! 3< Al! 3< Mg


Ans: a

1-. DuraKomin contains(a) &< aluminium! &< copper and .< Mn! Mg! +i and ;e

(b) 2.< aluminium! &< copper! 2< nic#el! and 1.< Mg

(c) 1< aluminium and < copper


(e) &< aluminium and < tin.

Ans: a

1-*. Beutral solution is one "hich has p@ value

(a) greater than *

(b) less than *

(c) e%ual to *

(d) p@ value has nothing to do "ith neutral solution


Ans: c

1--. Acidic solution is one "hich has p@ value

(a) greater than *

(b) less than *

(c) e%ual to *

(d) p@ value has nothing to do "ith neutral solution


Ans: b



1-. asic solution is one "hich has p@ value

(a) greater than *

(b) e%ual to *

(c) less than *

(d) p@ value has nothing to do "ith basic solution


Ans: a

1. ;ollo"ing elements have face,centred cubic structure

(a) gamma iron (1/ to 1&/0)! 0u! Ag! Au! Al! Bi! 7b! 7t

(b) Mg! Ln! 'i! Lr! r! 0d

(c) a iron (belo" 1/0 and bet"een 1& to 13/0)! 9


(e) none of the above.Ans: a

11. 5ecrystallisation temperature can belo"ered by

(a) purification of metal

(b) grain refinement

(c) "or#ing at lo"er temperature



Ans: d

12. 7earlite is a combination of

(a) ferrite and cementite

(b) cementite and gamma iron

(c) ferrite and austenite

(d) ferrite and iron graphite

(e) pearlite and ferrite.

Ans: a

13. Austenite rs a combination of

(a) ferrite and cementite

(b) cementite and gamma iron

(c) ferrite and austenite

(d) ferrite and iron graphite



(e) pearlite and ferrite.

Ans: b

1&. 'he transistor is made of

(a) silver

(b) gold

(c) copper

(d) germanium

(e) german silver.

Ans: d

1. Head is poured into the 4oint bet"een t"o pipes. 'hese pipes may be made of

(a) cast iron

(b) vitrified clay(c) asbestos cement

(d) concrete

(e) mild steel.

Ans: a

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