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Mechanical - 540 Unit 2 Material Science and Heat Treatment - MCQ

76)   

What is the commonly used medium for quenching in heat treatment? 

A.
B.
C.
D.
Answer: D
77)   

Which of the following is a ferrous metal? 

A.
B.
C.
D.
Answer: C
78)   

What is the main objective of tempering steel?

A.
B.
C.
D.
Answer: B
79)   

Which material property describes its ability to be hammered into thin sheets? 

A.
B.
C.
D.
Answer: B
80)   

Which insulating material is commonly used in high-temperature furnaces?

A.
B.
C.
D.
Answer: D
81)   

What is the key feature of the case-hardening process? 

A.
B.
C.
D.
Answer: A
82)   

What is the significance of the lower critical temperature (LCT) in heat treatment? 

A.
B.
C.
D.
Answer: B
83)   

What microstructure is typically obtained in steel after annealing?

A.
B.
C.
D.
Answer: C
84)   

Which property of timber makes it suitable for construction? 

A.
B.
C.
D.
Answer: B
85)   

What is the primary structural change in steel during hardening? 

A.
B.
C.
D.
Answer: A
86)   

Which property distinguishes steel from iron?

A.
B.
C.
D.
Answer: C
87)   

Which alloying element enhances corrosion resistance in steel? 

A.
B.
C.
D.
Answer: A
88)   

What does the color observed during tempering indicate? 

A.
B.
C.
D.
Answer: D
89)   

Which property is common in all non-ferrous metals? 

A.
B.
C.
D.
Answer: B
90)   

What is the term for cooling steel rapidly during quenching?

A.
B.
C.
D.
Answer: B
91)   

Which of the following materials has the highest elasticity? 

A.
B.
C.
D.
Answer: B
92)   

Which property of steel is improved by tempering? 

A.
B.
C.
D.
Answer: B
93)   

What is the name of the process used to harden rubber?

A.
B.
C.
D.
Answer: A
94)   

High-carbon steel is commonly used for which application? 

A.
B.
C.
D.
Answer: A
95)   

What is a characteristic property of ferrous metals?

A.
B.
C.
D.
Answer: A
96)   

During hardening, what happens to steel when cooled rapidly?

A.
B.
C.
D.
Answer: A
97)   

Which application is most suitable for cast iron? 

A.
B.
C.
D.
Answer: A
98)   

Which medium provides the fastest cooling rate during quenching? 

A.
B.
C.
D.
Answer: D
99)   

Which property is most important for thermal insulating materials? 

A.
B.
C.
D.
Answer: A
100)   

What is the purpose of normalizing steel? 

A.
B.
C.
D.
Answer: A