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MCQ - TNPSC JTO

JTO - 540 - Trade - Workshop Calculation Science

540 Unit 2 Material Science and Heat Treatment

113)   

Which property of cast iron makes it suitable for engine blocks?

A.
B.
C.
D.
114)   

What happens to steel when heated above the upper critical temperature? 

A.
B.
C.
D.
115)   

Which non-ferrous metal is widely used in electrical wiring?

A.
B.
C.
D.
116)   

Which property makes timber durable for outdoor use?

A.
B.
C.
D.
117)   

During tempering, which structural transformation occurs in steel?

A.
B.
C.
D.
118)   

What makes rubber highly elastic? 

A.
B.
C.
D.
119)   

What is a key difference between steel and cast iron?

A.
B.
C.
D.
120)   

Which insulating material has the lowest thermal conductivity? 

A.
B.
C.
D.
121)   

Which process is used to harden only the surface of steel?

A.
B.
C.
D.
122)   

What makes stainless steel resistant to corrosion?

A.
B.
C.
D.
123)   

Which type of rubber is used in making vehicle tires? 

A.
B.
C.
D.
124)   

Which heat treatment process helps refine the grain structure of steel? 

A.
B.
C.
D.
125)   

Why is teak commonly used in construction? 

A.
B.
C.
D.
126)   

Why is cast iron considered brittle?

A.
B.
C.
D.
127)   

What happens to steel after annealing? 

A.
B.
C.
D.
128)   

Which of the following is classified as hardwood?

A.
B.
C.
D.