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Material Technology & Heat Treatment Quiz

Total questions: 118

Worksheet time: 59mins

Name
Class
Date
1.

Electrons revolve around a __________

a)

Positively

b)

Negatively

c)

Natural

d)

Freezing

2.

Atoms can achieve stable configuration by ____________

a)

By loosing one or more electrons

b)

By gaining

c)

By sharing

d)

One

e)

all the above

3.

The strength of the interatomic bond influences the __________

a)

property

b)

melting

c)

boiling

d)

both A&B

e)

Freezing

4.

the primary bond is a ________bond

a)

Inter molecular

b)

inter atomic

c)

Hydrogen

d)

Van Der waals

5.

An example of primary bond is_______

a)

Ionic

b)

Covalent

c)

Metallic

d)

all the above

6.

intermolecular bond is called as_________

a)

Primary bond

b)

secondary bond

c)

Dispersion Bond

d)

Van Der waals

7.

secondary bond ionic bonds__________

a)

Primary bond

b)

secondary bond

c)

Dispersion Bond

d)

Van Der waals

8.

Sodium chloride is the classical _________

a)

meterial

b)

covalent

c)

ionic

d)

vander waals

9.

in covalent bonding stable configuration are achieved by __________

a)

sea of electrons

b)

sharing of electrons

c)

loses the electrons

d)

sharing of electrons

10.

Methane ( CH4) is an example of________

a)

material

b)

covalent

c)

ionic

d)

vander waals

11.

Metallic bond is a _______ Bond

a)

inter atomic

b)

inter molecular

c)

Hydrogen

d)

Van Der waals

12.

metallic bonding is found in ____________& _____________

a)

plastic

b)

metals

c)

alloys

d)

Both B&C

13.

the word electron cloud is related to ______

a)

hydrogen bond

b)

ionic bond

c)

Metallic Bond

d)

covalent bond

14.

The bond formed due to ______________

a)

By Sharing electrons

b)

By gaining

c)

By Loosing one

d)

all the above

15.

The bond exist between electron cloud & positive ions is ___________

a)

hydrogen bond

b)

Metallic Bond

c)

Ionic Bond

d)

covalent bond

16.

ionic bond exists due to elecrostatic force of attraction between ____________

a)

electrostatic force of attraction between Positive and negative ions of different elements

b)

electrostatic force of attraction between atoms

c)

Electron cloud and positive ions

d)

Van Der waals

17.

covalent bond exist due to elecrostatic force of attraction between ____________

a)

electrostatic force of attraction between Positive and negative ions of different elements

b)

electrostatic force of attraction between atoms

c)

Electron cloud and positive ions

d)

Van Der waals

18.

Metallic bond exist due to elecrostatic force of attraction between ____________

a)

electrostatic force of attraction between Positive and negative ions of different elements

b)

electrostatic force of attraction between atoms

c)

Electron cloud and positive ions

d)

Van Der waals

19.

one of the atoms looses its valence electrons and other accepts it is known as_________

a)

hydrogen bond

b)

ionic bond

c)

Metallic Bond

d)

covalent bond

20.

sharing of electron pairs between the atoms of same or different elements is known as _____

a)

hydrogen bond

b)

ionic bond

c)

Metallic Bond

d)

covalent bond

21.

The ____________solids_have high electrical and thermal conductivity

a)

ionic solids

b)

Metallic solids

c)

covalent solids

d)

dispersion bond

22.

The____________solids are very hard due to their crystalline structure

a)

ionic solids

b)

Metallic solids

c)

covalent solids

d)

dispersion bond

23.

the ionic solids are soluble in _________

a)

benzene

b)

kerosene

c)

water

d)

dispersion bond

24.

the covalent solids are soluble in__________

a)

benzene

b)

kerosene

c)

water

d)

dispersion bond

25.

an example for secondary bond____________

a)

ionic

b)

Covalent

c)

metallic

d)

Van Der waals

26.

hydrogen bond a special type of ______bond

a)

ionic

b)

secondary

c)

metallic

d)

covalent bond

27.

the structure of crystal depends on the ________

a)

type of bonds

b)

type of crystals

c)

type of lattice

d)

type of atomic structure

28.

in which structure a regular array of atoms are arranged

a)

crystalline

b)

non crystalline

c)

unit cells

d)

dispersion bond

29.

another name of amorphous structure is_________

a)

crystalline

b)

non crystalline

c)

unit cells

d)

dispersion bond

30.

examples of crystalline solids ______

a)

plastic

b)

wood

c)

metals

d)

gas

31.

examples of non crystalline solids ______

a)

copper

b)

iron

c)

glass

d)

aluminium

32.

a space lattice is an infinite_______

a)

pattern of atoms

b)

3 dimensional

c)

2 dimensional

d)

one dimensional

33.

a smallest part of a crystal which will give a complete space lattice

a)

unit cell

b)

Primitive cell

c)

Inter atomic

d)

unit cell

34.

there are ________classes of crystal systems based on the

a)

2

b)

3

c)

4

d)

3

35.

most of the common _______possess cubic or hexagonal

a)

gas

b)

wood

c)

liquids

d)

metals

36.

the coordination no of bcc structure is______

a)

8

b)

12

c)

6

d)

14

37.

the coordination no of fcc structure is_____

a)

6

b)

8

c)

12

d)

14

38.

the coordination no of hcp structure is_____

a)

14

b)

12

c)

6

d)

12

39.

atomic packing factor of fcc is_____

a)

0.74

b)

0.6

c)

0.78

d)

0.47

40.

atomic packing factor of bcc is_____

a)

0.68

b)

0.74

c)

0.6

d)

0.78

41.

atomic packing factor of hcp is_____

a)

0.68

b)

0.74

c)

0.6

d)

0.78

42.

the total no of atoms in bcc structure is_____

a)

6

b)

8

c)

9

d)

10

43.

the total no of atoms in fcc structure is_____

a)

12

b)

14

c)

16

d)

9

44.

point defects takes place due to______

a)

perfect packing

b)

symmetry

c)

grain growth

d)

imperfect packing

45.

whenever one or more atoms are missing from a structure_________

a)

vacany

b)

interstitial

c)

substitutional

d)

all the above

46.

whenever an extra atom occupies voids positions the defect is ____

a)

vacany

b)

interstitial

c)

substitutional

d)

Frenkal Defect

47.

whenever an missing atom occupies interstitial positions ______

a)

vacany

b)

interstitial

c)

substitutional

d)

Frenkal Defect

48.

whenever an foreign atom occupies a position which was initially meant for the parent atom or in other words replaces the parent atom the defect caused is known as__________

a)

vacany

b)

interstitial

c)

substitutional

d)

Frenkal Defect

49.

defect which takes place in the surface of a material is _______ defect

a)

vacany

b)

surface

c)

substitutional

d)

Frenkal Defect

50.

the minor element added to the solvent is called______

a)

solute

b)

solvent

c)

phase

d)

inter atomic

51.

the major element added to solute is called_______

a)

solute

b)

solvent

c)

phase

d)

inter atomic

52.

When homogeneous mixtures of two or more kinds of atom occur in the solid state they are known as__

a)

interstitial defect

b)

solvent

c)

solid solution

d)

Grain Growth

53.

solid solutions consists of two kinds of atoms combined in one type of _____

a)

Phase

b)

space lattice

c)

vacancy

d)

solute

54.

brass is a solid solution of _______&zinc

a)

copper

b)

tin

c)

aluminium

d)

iron

55.

Ni-cu alloys is known as______

a)

steel

b)

brass

c)

Bronze

d)

Monel Metal

56.

atomic diameter of copper is_____

a)

2.51 A

b)

2.51 A

c)

2.41 A

d)

2.31 A

57.

condition for substitutional solid solutions are_____

a)

The atomic radaii should be same

b)

Their lattice types must be the same

c)

The lower valency metal becomes the solvent

d)

Their chemical affinity is small

58.

if the solute of atoms do not occupy any specific position it is known as_____

a)

Ordered substitutional

b)

substitution

c)

dis ordered

d)

Intertitisal defects

59.

atoms of dissolving element fit in to vacant spaces is known as_______

a)

Ordered substitutional

b)

substitution

c)

dis ordered

d)

Intertitisal defects

60.

a single crystal of a material can consist of ______

a)

one

b)

two

c)

three

d)

inter atomic

61.

example of multiphase alloys______

a)

Ceramic Materials

b)

wood

c)

fibre

d)

all the above

62.

the homogeneous mixture of two or more element of solids____

a)

phase

b)

alloy

c)

solvent

d)

solid solution

63.

Cementite becomes paramagnetic at?

a)

224 °C

b)

370 °C

c)

210 °C

d)

300 °C

64.

Pearlite exists at_______only?

a)

723 °C

b)

770 °C

c)

900 °C

d)

800 °C

65.

Austenite can dissolve up to _____ of carbon at 1148 °C?

a)

3%

b)

2%

c)

1%

d)

4%

66.

Martensite represents a ________like appearance under needle?

a)

tiny globulus

b)

flat

c)

sphere

d)

needle

67.

Martensite is obtained when steel is cooled_____?

a)

slowly

b)

furnace

c)

rapidly

d)

inter atomic

68.

Soaking results in the formation of ______ through out?

a)

ferrite

b)

homogeneous martensite

c)

bainite

d)

homogeneous

69.

Purpose of heat treatment process ______?

a)

to relieve internal stress

b)

to restore ductility

c)

to refine the grains

d)

all the above

70.

Internal stress leads to______?

a)

formation of pearlite

b)

warpage

c)

rust formation

d)

inter atomic

71.

Purpose of annealing is ______?

a)

relieve internal stress

b)

warpage

c)

remove rust

d)

all the above

72.

Purpose of full annealing is______?

a)

remove warpage

b)

remove rust

c)

removing the hardness completely

d)

to produce homogeneous structure

73.

Purpose of box annealing is_____?

a)

remove warpage

b)

remove rust

c)

removing the hardness completely

d)

minimize oxidation

74.

Purpose of bright annealing is____?

a)

remove warpage

b)

prevent from discolouration

c)

removing the hardness completely

d)

minimize oxidation

75.

Purpose of spherodizing annealing____?

a)

improve machinability

b)

prevent from discolouration

c)

removing the hardness completely

d)

minimize oxidation

76.

Process annealing is also known as ____?

a)

full annealing

b)

box annealing

c)

intermediate annealing

d)

spherodizing

77.

Normalizing helps to improve ____?

a)

machinability of low carbon steel

b)

to refine the grains

c)

homogenize the structure

d)

all the above

78.

The rapid cooling is achieved by_____?

a)

needle formation

b)

quenching

c)

solidification

d)

inter atomic

79.

In hardening the austenite is transferred to another form is_______?

a)

martensite

b)

ferrite

c)

pearlite

d)

bainite

80.

Successful hardening requires ______?

a)

formation of homogeneous martensite

b)

rapid quenching

c)

both A&B

d)

atom

81.

Soaking time for hardening____?

a)

1 h for every 15 mm thickness

b)

1 h for every 25 mm thickness

c)

1 h for every 10 mm thickness

d)

1 h for every 30 mm thickness

82.

Quenching leads to______?

a)

distortion and cracking

b)

formation of defect

c)

improve machinability

d)

atom

83.

Most commonly used quenching media is ____?

a)

kerosene

b)

diesel

c)

petrol

d)

water

84.

Transformation of austenite to bainite at a constant______?

a)

water quenching

b)

oil quenching

c)

isothermal quenching

d)

all the above

85.

Dry ice and liquefied gases can be used in____?

a)

normalizing

b)

sub zero treatments

c)

spherodizing

d)

tempering

86.

Internal stresses will result in____?

a)

heavy distortion

b)

cracking

c)

both A&B

d)

atom

87.

All hardened steel must be _____ after hardening?

a)

tempered immediately

b)

quenched

c)

case hardened

d)

atom

88.

In case hardening the surface layer known as____?

a)

core

b)

case

c)

phase layer

d)

case

89.

In case hardening the inner layer known as____?

a)

core

b)

case

c)

phase layer

d)

core

90.

Changing the chemical composition at the surface of the steel is known as_____?

a)

surface hardening

b)

normalizing

c)

case hardening

d)

sub zero treatment

91.

Pack carburizing also known as ____?

a)

gas carburizing

b)

liquid

c)

spherodizing

d)

solid carburizing

92.

Liquid carburizing also known as____?

a)

salt bath carburizing

b)

gas

c)

spherodizing

d)

solid carburizing

93.

In liquid carburizing_____ type of furnace is used?

a)

pit furnace

b)

pot type

c)

muffle furnace

d)

lift off cover

94.

In flame hardening heating the job with_____?

a)

oxy acetylene

b)

oxy-fuel

c)

both A&B

d)

LPG

95.

Normally ______ of carbon content steel will be flame hardened?

a)

0.1-0.2 %

b)

0.7-0.8%

c)

1-6%

d)

0.3-0.6%

96.

In electron beam hardening the work piece is kept in______?

a)

vacuum

b)

air

c)

water

d)

ice

97.

In vacuum hardening ______ used for quenching?

a)

oxygen

b)

nitrogen

c)

argon

d)

Both B&C

98.

Martempering is also known as____?

a)

stepped quenching

b)

interrupted quenching

c)

both A&B

d)

salt bath carburizing

99.

Austempering is also known as____?

a)

stepped quenching

b)

interrupted quenching

c)

isothermal quenching

d)

salt bath carburizing

100.

Subzero treatment done to convert____ into martensite?

a)

retained austenite

b)

ferrite

c)

pearlite

d)

bainite

101.

Basic requirements for a heat treatment furnace is ____?

a)

to ensure uniform heating

b)

easy and safe operation

c)

not to occupy any difficulties

d)

all the above

102.

According to source of heat heat treatment furnace classified into_____?

a)

hardening furnace

b)

fuel-fired

c)

electrically heated furnace

d)

Both B&C

103.

According to the type of fuel used for heat treatment furnace is _____type?

a)

solid fuel

b)

liquid

c)

gaseous

d)

all the above

104.

More economical fuel used for heat treatment furnace?

a)

solid fuel

b)

liquid

c)

gaseous

d)

all the above

105.

Most commonly used heat treatment furnace is ____?

a)

electrically heated furnace

b)

solid fuel

c)

liquid

d)

gaseous

106.

Advantage of muffle furnace is that___?

a)

less scaling

b)

reduced contact

c)

both A&B

d)

can be lift

107.

For heat treating large part____type of furnace is used?

a)

muffle furnace

b)

pit furnace

c)

lift off cover

d)

pot type

108.

Lift off cover furnace also known as____?

a)

bell type furnace

b)

muffle

c)

pit furnace

d)

pot type

109.

In a salt bath furnace commonly used salts are____?

a)

nitrates

b)

caustic soda

c)

cyanides

d)

all the above

110.

For removing oxides and dirt _____process commonly?

a)

acid pickling

b)

grit blasting

c)

alkaline cleaning

d)

straightening

111.

Sulphuric acid is the most commonly used acid in ____?

a)

acid pickling

b)

grit blasting

c)

alkaline cleaning

d)

straightening

112.

For cleaning casting and forging of sand and scale ____?

a)

acid pickling

b)

grit blasting

c)

alkaline cleaning

d)

straightening

113.

In wet blasting ____is mixed with abrasives?

a)

air

b)

gas

c)

water

d)

atom

114.

For removing oils and grease_____process commonly?

a)

acid pickling

b)

grit blasting

c)

alkaline cleaning

d)

straightening

115.

For the result of improper quenching_____will form?

a)

necking

b)

scale

c)

rust formation

d)

warping

116.

Metallurgical microscope consist of mainly____?

a)

compound microscope

b)

electrical illumination

c)

both A&B

d)

atom

117.

In a metallurgical microscope magnification depends on?

a)

focal length

b)

object

c)

type of lens

d)

atom

118.

In metallurgical microscope the focal length is short______will be the magnification of structure?

a)

short

b)

greater

c)

same

d)

atom

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