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MCQ - TNPSC JTO

JTO - 540 - Trade - Workshop Calculation Science

540 Unit 2 Material Science and Heat Treatment

81)   

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

A.
B.
C.
D.
82)   

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

A.
B.
C.
D.
83)   

What microstructure is typically obtained in steel after annealing?

A.
B.
C.
D.
84)   

Which property of timber makes it suitable for construction? 

A.
B.
C.
D.
85)   

What is the primary structural change in steel during hardening? 

A.
B.
C.
D.
86)   

Which property distinguishes steel from iron?

A.
B.
C.
D.
87)   

Which alloying element enhances corrosion resistance in steel? 

A.
B.
C.
D.
88)   

What does the color observed during tempering indicate? 

A.
B.
C.
D.
89)   

Which property is common in all non-ferrous metals? 

A.
B.
C.
D.
90)   

What is the term for cooling steel rapidly during quenching?

A.
B.
C.
D.
91)   

Which of the following materials has the highest elasticity? 

A.
B.
C.
D.
92)   

Which property of steel is improved by tempering? 

A.
B.
C.
D.
93)   

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

A.
B.
C.
D.
94)   

High-carbon steel is commonly used for which application? 

A.
B.
C.
D.
95)   

What is a characteristic property of ferrous metals?

A.
B.
C.
D.
96)   

During hardening, what happens to steel when cooled rapidly?

A.
B.
C.
D.