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Seat No. Enrolment No.:
Gujarat Technological University
Diploma Engineering C to D Bridge Course Examination
Subject Code: C321902 Date: 03-01-2019
Subject Name: Material Science and Metallurgy
Time: 10.30 AM TO 12.00PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumption wherever necessary.
3. Each question is of 1 mark.
4. Use of SIMPLE CALCULATOR is permissible. (Scientific/Higher Version not allowed)
5. English version is authentic.
Question Text and Option.
1
Which one of following is a main or primary bond?
A
Ionic bond
B
Dispersion bond
C
Dipole bond
D
Hydrogen bond


A

B

C

D

2
Total atoms of F.C.C. unit cell
A
1
B
2
C
4
D
6


A

B

C

D

3
Colour is a Properties of metal.
A
Physical
B
Magnetic
C
Electric
D
Thermal
3

A

B

C

D

4
Ability of metal to be drawn into wire is known
A
Ductility
B
Strength
C
Hardness
D
Brittleness


A

B

C

D

5
Tungsten structure.
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A
F.C.C
B
B.C.C
C
H.C.P.
D
NONE OF THE ABOVE


A
F.C.C
B
B.C.C
C
H.C.P.
D

6
Nacl has bond.
A
Ionic
B
Metallic
C
Dipole
D
Hydrogen

Nacl
A

B

C

D

7
Which one is a chemical properties?
A
Acidity
B
Molecular weight
C
Alkalinity
D
All of the above


A

B

C

D

8
Which material has higher electrical conductivity?
A
Aluminium
B
Silver
C
Magnesium
D
Iron


A

B

C

D

9
What is the reason behind for alloying of steel?
A
Increase hardness
B
Increase weldability
C
Increase fatigue
D
All of the above


A

B

C

D

10
Which one of the following is major alloying elements?
A
Nickle
B
Brass
C
Bronze
D
Steel


A

B

C

D

11
Which one of the following terms is related to equilibrium diagram?
A
System
B
Component
C
Phase
D
All of the above


A

B

C

D

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12
Purpose of heat treatment of metal is
A
Decrease hardness
B
Increase strength
C
Decrease toughness
D
None of the above


A

B

C

D

13
Structure has maximum hardness.
A
Troostile
B
Pearlite
C
Martensite
D
Sorbate


A

B

C

D

14
Austenite is a solid solution of carbon in iron.
A
Alpha
B
Gamma
C
Beta
D
delta


A

B

C

D

15
Which type of furnace used for heat treatment of small size parts?
A
Box furnace
B
Cupola furnace
C
Blast furnace
D
Air furnace


A

B

C

D

16
Chromium steel.
A
Corrosion resistance
B
Brittleness
C
Ductility
D
None of the above.


A

B

C

D

17
Softest phase of steel is
A
Ferrite
B
Pearlite
C
Bainite
D
cementite


A

B

C

D

18
Ammonia gas is used
A
Nitriding
B
Flame hardening
C
Induction hardening
D
Cyaniding


A

B

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C

D

19
Pig iron is product is obtained from furnace.
A
Cupola
B
Blast
C
Open hearth
D
Induction


A

B

C

D

20
Brass is an alloy of
A
Copper and zink
B
Copper and tin
C
Copper,tin and zink
D
Copper and iron


A

B

C

D

21
Leduberite has of carbon.
A
0.025
B
0.8
C
4.3
D
6.67


A

B

C

D

22
The percentage of carbon in cast iron is
A
0.1 to 0.5
B
0.5 to 1
C
1 to 1.5
D
1.5 to 6.7


A
0.1 0.5
B
0.5 1
C
1 1.5
D
1.5 6.7
23
In Fe-C on X-axis and on Y-axis.
A
Temperature carbon
B
Temperature, time
C
carbon Temperature
D
Time, temperature


A

B

C

D

24
From following which is not a type of carburising process.
A
Pack carburising
B
Liquid carburising
C
Gas carburising
D
solid carburising


A

B

C

D

25
What is the purpose of annealing?
A
Increase formability
B
Remove stress
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C
Remove strain
D
All of the above


A

B

C

D

26
The magnification of metallurgical microscope
A
Below 20X
B
400x to 2500x
C
2000x to 20000x
D
2000x to 20000x


A
20X
B
20X
C
2000x 20000x
D
2000x 20000x
27
The name of lens in microscope near specimen
A
Eyepiece
B
Collector lens
C
Objective
D
Draw tube


A

B

C

D

28
Which equipment is used for preparation of specimen?
A
Metal cutting machine
B
Press
C
Die and punch
D
All of this


A

B

C

D

29
The type of etchant used for C.I and steel specimen is
A
Nitric acid
B
Ammonia
C
Nital
D
Glycerol


A

B

C

D

30
Microscope work on the principle of
A
Reflation of light rays
B
Absorption of light rays
C
Transmission of light rays
D
None of the above


A

B

C

D

31
From following which is not a type of quenching mediums.
A
Cold water
B
Hot water
C
Vegetable oil
D
Polymer


A

B

C

D

32
Cast iron is a
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A
Ductile
B
Brittle
C
Plastic
D
Elastic


A

B

C

D

33
The product of cupola furnace is
A
Wrought iron
B
Cast iron
C
Stainless steel
D
steel


A

B

C

D

34
Steel with carbon above 0.8% is known as
A
Hypo eutectoid
B
Hyper eutectoid
C
Eutectoid
D
None of the above


A

B

C

D

35
Bauxite is a ore of
A
Copper
B
Aluminium
C
Tin
D
iron


A

B

C

D

36
Which material is used for making cooking utensils?
A
Stainless steel
B
Aluminium
C
Cast iron
D
Both A and B
36

A

B

C

D
A B
37
is used for making machine bed.
A
Gray cast iron
B
White cast iron
C
Steel
D
Mild steel


A

B

C

D

38
Colour of hematite
A
Black
B
Brown
C
White
D
Red


A

B

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C

D

39
not alloy of aluminium.
A
Duralium
B
Hindalium
C
Mangalium
D
bronze


A

B

C

D

40
Which properties is required for bearing material?
A
High wear resistance
B
Good thermal conductivity
C
Both A B
D
None of the above


A

B

C
A B
D

41
The melting temperature of aluminium
A
C
B
C
C
C
D
C


A
C
B
C
C
C
D
C
42
Bronze is a commonly used material
A
Bearing
B
Pipes
C
Sheet
D
Nut and bolt


A

B

C

D

43
Compare to steel, aluminium
A
Higher strength
B
Higher hardness
C
Higher machinability
D
Low corrosion resistance


A

B

C

D

44
German silver has of silver.
A
80
B
20
C
0
D
50


A

B

C

D

45
Y-ALLOY is an alloy of
A
Copper-tin
B
Copper-zinc
C
Aluminium-lead
D
Aluminium-copper
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A

B

C

D

46
Connecting rod is usually made
A
Cast iron
B
Aluminium
C
Steel
D
Copper


A

B

C

D

47
used for making shaft and axel.
A
Mild steel
B
Medium carbon steel
C
High carbon steel
D
Dead mild steel


A

B

C

D

48
Which of the following material is non-metallic?
A
Brass
B
Steel
C
Rubber
D
Cast iron


A

B

C

D

49
Non-ferrous metal are those which does not
A
Aluminium
B
Copper
C
Iron
D
Nickel


A

B

C

D

50
Cermet is a material.
A
Composite
B
Metallic
C
Plastic
D
ceramic


A

B

C

D

51
Which among the following is an organic polymer?
A
Plastic
B
Silica
C
Ceramic
D
brass


A

B

C

D

52
The hardest known material is
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A
Diamond
B
High speed steel
C
Ceramic
D
Mild steel


A

B

C

D

53
What is the full form of P.V.C.?
A
Polyvinyl chloride
B
Polyvinyl calcium
C
Polyvinyl cement
D
Polyvinyl chromic


A

B

C

D

54
not a plastic material.
A
ABS
B
PVC
C
HDPE
D
CORK


A
ABS
B
PVC
C
HDPE
D
CORK
55
is a heat insulating material.
A
Glass
B
Ceramic
C
Mica
D
glass wool


A

B

C

D

56
M Seal, Quick Fix, Araldite are example of material.
A
Adhesive
B
Abrasive
C
Ceramic
D
insulating


A

B

C

D

57
To protect surface, metals are normally coated
A
Paints
B
Varnish
C
Enamel
D
All of above


A

B

C

D

58
Which of the following is non-destructive test?
A
Tensile test
B
Impact test
C
Cupping test
D
Radiography test


A

B

C

D

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59
In electroplating process work-piece is used as
A
Anode
B
Cathode
C
Anode and cathode
D
None of the above


A

B

C

D

60
Which one of the following is not the purpose of electroplating?
A
Improve appearance
B
Protect against corrosion
C
Rework worn out parts
D
Improve hardness


A

B

C

D

61
is the semi-conductor of electricity.
A
Wood
B
Silicon
C
Plastic
D
Rubber


A

B

C

D

62
The solution which permits flow of current is
A
Electrolyte
B
Non Electrolyte
C
Composition cell
D
Stress cell


A

B

C

D

63
The percentage of tungsten in 18:4:1 H.S.S. is
A
18%
B

C

D
NIL


A

B

C

D

64
Identify powder metallurgy product.
A
Pipe
B
Table
C
Bulb filament
D
Machine bed


A

B

C

D

65
Which one is desired properties for lubricating oil?
A
cleanliness
B
Oxidation stability
C
Oiliness
D
All of above


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A

B

C

D

66
Sintering is process carried out in
A
Annealing
B
Cyaniding
C
Powder Metallurgy
D
Machining


A

B

C

D

67
Wastage of material in powder metallurgy is
A
15%
B
10%
C

D
NIL


A

B

C

D

68
Powder metallurgy process is used making product
A
Large size product
B
Smaller size product
C
Steel product
D
Porous product


A

B

C

D

69
To reduce wear of the surface is used.
A
Lubricant
B
Adhesive
C
Abrasive
D
Colour


A

B

C

D

70
is a localized corrosion in which small holes are formed.
A
Crevice corrosion
B
Stress corrosion
C
Pitting corrosion
D
Uniform corrosion


A

B

C

D