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Manufacturing Engineering Ii
Manufacturing Processes Exam
Quiz 1
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Q.1
How many types of hardening processes are commonly used?
a) 3
b) 5
c) 6
d) 7
Q.2
Which of the following is not the purpose of the surface hardening?
a) To improve wear resistance
b) To increase fatigue life
c) Prevention from cracking
d) To improve ductility
Q.3
How many surface hardening methods are there which are commonly used?
a) 2
b) 3
c) 4
d) 5
Q.4
Shot peening technique is applicable to all metals and alloys that are prone to _____
a) plastic deformation
b) brittle failure
c) fatigue failure
d) ductile deformation
Q.5
Which of the following is not subjected to shot peening?
a) Landing gears of an aircraft
b) Automotive gears
c) Shafts
d) Coil springs
Q.6
Which of the following is not the outcome of hard facing?
a) Improved resistance to particle erosion
b) Improved resistance to abrasion
c) Improved resistance to fretting
d) Improved resistance to plastic deformation
Q.7
Which of the following is the most commonly used coating materials for hard facing?
a) Mixture of chromium carbide and cobalt
b) Mixture of calcium nitrate and iron carbide
c) Mixture of copper oxide and zinc oxide
d) Mixture of boron carbide and vanadium pentoxide
Q.8
Induction hardening is used for _____
a) steels
b) aluminium alloys
c) copper alloys
d) zinc alloys
Q.9
During induction hardening, the microstructure of the surface gets transformed into _____
a) austenite
b) perlite
c) bainite
d) martensite
Q.10
Which of following is not the feature of induction hardening?
a) Heat the surface to a temperature above an austenitic region
b) Good surface finish
c) Fast heating & short hold time
d) Applicable to carbon steels having (0.8– 1% C)
Q.11
The hardness of steel depends only on the ______
a) carbon content
b) temperature
c) yield strength
d) tensile strength
Q.12
A major limitation of pack carburizing is poor control over_____
a) temperature
b) ductility
c) hardness
d) strength
Q.13
Which of the following is most commonly used as carburizing gas?
a) CH4
b) CO
c) N2
d) C2H2
Q.14
The main purpose of this stage is to harden the case consisting of austenite and globules of un‐dissolved carbide.
a) True
b) False
Q.15
The reasons for case hardening is to develop compressive residual stress.
a) True
b) False
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