Explore topic-wise MCQs in Testing Subject.

This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.

1.

FCC structure have APF (Atomic Packing Factor) of …..

A. 0.74
B. 0.52
C. 0.68
D. 0.8
Answer» B. 0.52
Discussion
2.

A unit cell represents of a crystal structure

A. weight
B. size
C. geometry
D. none of the above
Answer» D. none of the above
Discussion
3.

A single cubic crystal system consists of

A. a=b=c
B. a=b but not equal to c
C. β= α = γ = 90°
D. both a & c
Answer» E.
Discussion
4.

APF (Atomic Packing Factor) of Body- Centered Cubic structure is…..

A. 0.74
B. 0.52
C. 0.68
D. 0.8
Answer» D. 0.8
Discussion
5.

A non-crystalline material is characterized as having _

A. repetitive arrangement of atoms in all three direction
B. repetitive arrangement of atoms in any one direction
C. non- repetitative or random arrangement of atoms in all three directions
D. none of the above
Answer» C. non- repetitative or random arrangement of atoms in all three directions
Discussion
6.

A material having repetitive arrangement of atoms over larger atomic distances is called

A. crystalline material
B. non- crystalline material
C. solid material
D. liquid material
Answer» B. non- crystalline material
Discussion
7.

A higher value of co-ordination number indicates

A. bigger size of material
B. higher density of material
C. lower density of material
D. none of the above
Answer» C. lower density of material
Discussion
8.

A higher value of atomic packing factor number indicates

A. bigger size of material
B. higher density of material
C. higher value of avg. no. of atoms per unit cell
D. both b & c
Answer» E.
Discussion
9.

A hexagonal crystal system consists of

A. a=b=c
B. a=b but not equal to c
C. β= α = 90 °, γ = 120°
D. both b & c
Answer» E.
Discussion
10.

A family of directions is represented by

A. (hkl)
B. <uvw>
C. {hkl}
D. [uvw]
Answer» C. {hkl}
Discussion
11.

                       is defined as fraction of volume occupied by atoms in unit cell

A. ligancy number
B. avg. no. of atoms/ unit cell
C. atomic packing number
D. none of the above
Answer» D. none of the above
Discussion
12.

                     get for burger vector

A. quality
B. plane
C. direction
D. atoms
Answer» D. atoms
Discussion
13.

                 it is type of stacking faults

A. twinns
B. glide
C. climb
D. intrisic
Answer» E.
Discussion
14.

at 450 the resolved shear stress is

A. minimum
B. maximum
C. zero
D. none of the above
Answer» C. zero
Discussion
15.

               this is type of slip systems.

A. glide
B. slip
C. twinns
D. none of the above
Answer» B. slip
Discussion
16.

the resolved shear stress of a unit cell in nickel is N/mm2 if a tensile stress of 13.7 Mpa is applied. Take angle between the axial force and slip direction is 450 and angle between axial force and normal to slip is 540

A. 2.3
B. 5.7
C. 5.2
D. 6.1
Answer» C. 5.2
Discussion
17.

the machinery used for hot working is than used for cold working

A. cheaper
B. expensive
C. same
D. depends on mertals used
Answer» D. depends on mertals used
Discussion
18.

if resolved shear stress is maximum, it is given by

A. σt
B. 2σt
C. 4σt
D. 0.5σt
Answer» E.
Discussion
19.

in case of hot working of metals, there is higher possibility of

A. oxidation
B. decarburizat ion
C. both a and b
D. none of the above
Answer» D. none of the above
Discussion
20.

the possibility of oxidation is higher in case of working of metals

A. hot
B. cold
C. both
D. none of the above
Answer» B. cold
Discussion
21.

  cold working requires higher than hot working

A. temperature
B. time
C. energy for plastic deformation
D. none of the above
Answer» D. none of the above
Discussion
22.

it is possible to continuosly work on metal during working

A. hot
B. cold
C. both
D. none of the above
Answer» B. cold
Discussion
23.

wire drawing is a type of

A. cold working
B. hot working
C. cold working followed by hardening
D. none of the above
Answer» B. hot working
Discussion
24.

there are no residual internal stresses after hot working because

A. metal is annealed before hot working
B. there are no dislocations
C. there is simultaneou s working and recrystalliza tion
D. all of the above
Answer» D. all of the above
Discussion
25.

in working of metals, the microstructure is distorted

A. hot
B. cold
C. both
D. none of the above
Answer» C. both
Discussion
26.

hot forging is a type of

A. cold working
B. hot working
C. cold working followed by hardening
D. none of the above
Answer» C. cold working followed by hardening
Discussion
27.

strain hardening followed by annealing is known as

A. cold working
B. hot working
C. strain hardening
D. all of the above
Answer» C. strain hardening
Discussion
28.

during grain growth takes place

A. new grains are formed
B. no change in
C. larger grains are formed
D. all of the above
Answer» D. all of the above
Discussion
29.

after the recrystalllization stage

A. hardness and tensile strength reduces
B. internal stresses reduces whereas corrosion resistance increases
C. ductility increases
D. all of the above
Answer» E.
Discussion
30.

    new grain formation take place in stage of annealing treatment

A. recovery
B. grain growth
C. recrystalliza tion
D. none of the above
Answer» D. none of the above
Discussion
31.

the process of formation of new grains starts by the process of

A. recovery
B. nucleation
C. grain growth
D. none of the above
Answer» C. grain growth
Discussion
32.

nucleation starts at areas of

A. low energy
B. high energy
C. randomly
D. none of the above
Answer» C. randomly
Discussion
33.

during which stage of annealing there is no major change in microstructure ?

A. recrystalliza tion
B. recovery
C. grain growth
D. none of the above
Answer» C. grain growth
Discussion
34.

the heat treatment which is used to reduce the internal stresses after cold working is called as

A. hardeninig
B. annealing
C. carburising
D. quenching
Answer» C. carburising
Discussion
35.

during recovery part of annealing treatment, which of the following properties are improved noticeably?

A. hardness, electrical resistance, tensile strength
B. electrical resistance, tensile strength, corrosion resistance
C. tensile strength, corrosion resistance, ductility
D. internal stresses, electrical resistance, corrosion resistance
Answer» E.
Discussion
36.

the process by which the internal stresses are reduced in cold worked metal is called

A. strain hardening
B. hot working
C. heat treatment
D. cold treatment
Answer» D. cold treatment
Discussion
37.

the and property of metals decrease due to cold working

A. hardness, electrical conductivity
B. tensile strength, electrical conductivity
C. electrical resistance, internal stresses
D. corrosion resistance, ductility
Answer» E.
Discussion
38.

the property of metals increases and property decreases due to cold working

A. hardness, electrical conductivity
B. ductility, electrical conductivity
C. electrical resistance, internal stresses
D. corrosion resistance, ductility
Answer» B. ductility, electrical conductivity
Discussion
39.

the stress required to produce same deformation is higher in case of                         polycrystalline material as compared to polycrystalline materials

A. coarse garined, fine grained
B. fine grained, coarse grained
C. a or b
D. none of the above
Answer» D. none of the above
Discussion
40.

the and property of metals increase due to cold working

A. hardness, electrical conductivity
B. tensile strength, electrical conductivity
C. electrical resistance, internal stresses
D. corrosion resistance, ductility
Answer» D. corrosion resistance, ductility
Discussion
41.

the mechanism of plastic deformation in polycrystalline material is than the mechanism in single crystal structure

A. simpler
B. complex
C. same
D. random
Answer» C. same
Discussion
42.

Frank-Reed source is associated with -

A. vacancy and interstitial defect
B. reductiion in dislocations
C. multiplicati on of dislocations
D. none of the above
Answer» D. none of the above
Discussion
43.

working of metal below crystallization temperature is known as

A. cold working
B. hot working
C. any one of above
D. none of the above
Answer» B. hot working
Discussion
44.

for a given metal its recrystallization temperature depends on

A. amonut of cold working
B. grain size
C. melting temperature s
D. all of the above
Answer» E.
Discussion
45.

working of metal above crystallization temperature is known as

A. cold working
B. hot working
C. any one of above
D. none of the above
Answer» C. any one of above
Discussion
46.

finer is the grain size -

A. more is recrystalliza tion temperature
B. lesser is the recrystalliza tion temperature
C. recrystalliza tion temperature remains same
D. none of the above
Answer» C. recrystalliza tion temperature remains same
Discussion
47.

work hardening is the phenomenon observed if metal is worked the recrystallization temperature

A. above
B. below
C. independent of
D. none of the above
Answer» D. none of the above
Discussion
48.

after intial cold working, the stress required to further deform the material is

A. same
B. lower
C. higher
D. random
Answer» D. random
Discussion
49.

the phenomenon by virtue of which metals become harder and stronger without any heat treatment is called

A. strain hardening
B. work hardening
C. all of the above
D. none of the above
Answer» D. none of the above
Discussion
50.

FCC metals have higher ductility than BCC metals since _

A. fcc metals have higher
B. fcc metals have lower
C. fcc metals have lower
D. fcc metals have higher
Answer» C. fcc metals have lower
Discussion