980+ Material Science Solved MCQs

These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Electrical Engineering .

Take a Test

201.	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» C. electrical resistance, internal stresses

discuss

202.	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» D. corrosion resistance, ductility

discuss

203.	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» A. hardness, electrical conductivity

discuss

204.	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» C. heat treatment

discuss

205.	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» B. annealing

discuss

206.	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» D. internal stresses, electrical resistance, corrosion resistance

discuss

207.	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» B. recovery

discuss

208.	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» B. nucleation

discuss

209.	nucleation starts at areas of
A.	low energy
B.	high energy
C.	randomly
D.	none of the above
Answer» B. high energy

discuss

210.	new grain formation take place in stage of annealing treatment
A.	recovery
B.	grain growth
C.	recrystalliza tion
D.	none of the above
Answer» C. recrystalliza tion

discuss

211.	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» D. all of the above

discuss

212.	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» C. larger grains are formed

discuss

213.	strain hardening followed by annealing is known as
A.	cold working
B.	hot working
C.	strain hardening
D.	all of the above
Answer» B. hot working

discuss

214.	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» C. there is simultaneou s working and recrystalliza tion

discuss

215.	wire drawing is a type of
A.	cold working
B.	hot working
C.	cold working followed by hardening
D.	none of the above
Answer» A. cold working

discuss

216.	hot forging 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

discuss

217.	in working of metals, the microstructure is distorted
A.	hot
B.	cold
C.	both
D.	none of the above
Answer» B. cold

discuss

218.	it is possible to continuosly work on metal during working
A.	hot
B.	cold
C.	both
D.	none of the above
Answer» A. hot

discuss

219.	cold working requires higher than hot working
A.	temperature
B.	time
C.	energy for plastic deformation
D.	none of the above
Answer» C. energy for plastic deformation

discuss

220.	the possibility of oxidation is higher in case of working of metals
A.	hot
B.	cold
C.	both
D.	none of the above
Answer» A. hot

discuss

221.	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» C. both a and b

discuss

222.	the machinery used for hot working is than used for cold working
A.	cheaper
B.	expensive
C.	same
D.	depends on mertals used
Answer» C. same

discuss

223.	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» B. 5.7

discuss

224.	if resolved shear stress is maximum, it is given by
A.	σt
B.	2σt
C.	4σt
D.	0.5σt
Answer» D. 0.5σt

discuss

225.	at 450 the resolved shear stress is
A.	minimum
B.	maximum
C.	zero
D.	none of the above
Answer» B. maximum

discuss

226.	this is type of slip systems.
A.	glide
B.	slip
C.	twinns
D.	none of the above
Answer» A. glide

discuss

227.	it is type of stacking faults
A.	twinns
B.	glide
C.	climb
D.	intrisic
Answer» D. intrisic

discuss

228.	get for burger vector
A.	quality
B.	plane
C.	direction
D.	atoms
Answer» C. direction

discuss

229.	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» C. atomic packing number

discuss

230.	A crystalline material must have
A.	repetitive arrangement of atoms in any one direction
B.	repetitive arrangement of atoms in any two direction
C.	repetitive arrangement of atoms in all three direction
D.	none of the above
Answer» C. repetitive arrangement of atoms in all three direction

discuss

231.	A family of directions is represented by
A.	(hkl)
B.	<uvw>
C.	{hkl}
D.	[uvw]
Answer» B. <uvw>

discuss

232.	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» D. both b & c

discuss

233.	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» D. both b & c

discuss

234.	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» B. higher density of material

discuss

235.	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» A. crystalline material

discuss

236.	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» B. repetitive arrangement of atoms in any one direction

discuss

237.	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» D. both a & c

discuss

238.	A unit cell represents of a crystal structure
A.	weight
B.	size
C.	geometry
D.	none of the above
Answer» C. geometry

discuss

239.	APF (Atomic Packing Factor) of Body- Centered Cubic structure is…..
A.	0.74
B.	0.52
C.	0.68
D.	0.8
Answer» C. 0.68

discuss

240.	FCC structure have APF (Atomic Packing Factor) of …..
A.	0.74
B.	0.52
C.	0.68
D.	0.8
Answer» A. 0.74

discuss

241.	HCP structure have APF (Atomic Packing Factor) of …..
A.	0.74
B.	0.52
C.	0.68
D.	0.8
Answer» A. 0.74

discuss

242.	Atomic packing factor is
A.	distance between two adjacent atoms
B.	projected area fraction of atoms on a plane
C.	volume fraction of atoms in cell
D.	none
Answer» C. volume fraction of atoms in cell

discuss

243.	Average frequency of atomic vibrations in a solid (in Hz)
A.	10-12
B.	10-13
C.	10+12
D.	10+13
Answer» D. 10+13

discuss

244.	BCC have Average no. of atoms per unit cell
A.	6
B.	2
C.	4
D.	8
Answer» B. 2

discuss ⁽¹⁾

245.	BCC have ligancy number
A.	6
B.	12
C.	4
D.	8
Answer» D. 8

discuss ⁽¹⁾

246.	BCC having stacking
A.	abcabca bc
B.	aaaaaaa
C.	abababa b
D.	abcabab c
Answer» C. abababa b

discuss

247.	Beneficial property of foreign particles
A.	reduces density
B.	act as stress raisers
C.	obstructs dislocation motion
D.	none
Answer» C. obstructs dislocation motion

discuss

248.	Burger vector gives of the shift
A.	amount
B.	quality
C.	plane
D.	atoms
Answer» A. amount

discuss

249.	Burger vector to dislocation line is for edge dislocations
A.	perpendicul ar
B.	parallel
C.	inclined
D.	first perpendicul ar then parallel
Answer» B. parallel

discuss

250.	Carbon diffuses in Fe, this is type of impurity
A.	substitution al
B.	interstitial
C.	both a & b
D.	none of the above
Answer» B. interstitial

discuss

980+ Material Science Solved MCQs

the and property of metals increase due to cold working

the and property of metals decrease due to cold working

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

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

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

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

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

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

nucleation starts at areas of

new grain formation take place in stage of annealing treatment

after the recrystalllization stage

during grain growth takes place

strain hardening followed by annealing is known as

there are no residual internal stresses after hot working because

wire drawing is a type of

hot forging is a type of

in working of metals, the microstructure is distorted

it is possible to continuosly work on metal during working

cold working requires higher than hot working

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

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

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

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

if resolved shear stress is maximum, it is given by

at 450 the resolved shear stress is

this is type of slip systems.

it is type of stacking faults

get for burger vector

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

A crystalline material must have

A family of directions is represented by

A hexagonal crystal system consists of

A higher value of atomic packing factor number indicates

A higher value of co-ordination number indicates

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

A non-crystalline material is characterized as having _

A single cubic crystal system consists of

A unit cell represents of a crystal structure

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

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

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

Atomic packing factor is

Average frequency of atomic vibrations in a solid (in Hz)

BCC have Average no. of atoms per unit cell

BCC have ligancy number

BCC having stacking

Beneficial property of foreign particles

Burger vector gives of the shift

Burger vector to dislocation line is for edge dislocations

Carbon diffuses in Fe, this is type of impurity