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MCQ - TNPSC JTO

JTO - 540 - Trade - Workshop Calculation Science

540 Unit 2 Material Science and Heat Treatment

129)   

Which material is widely used for thermal insulation in buildings?

A.
B.
C.
D.
130)   

Which cooling method is most effective for improving hardness during quenching?

A.
B.
C.
D.
131)   

What is the primary difference between low-carbon and high-carbon steel?

A.
B.
C.
D.
132)   

Normalizing steel improves which property?

A.
B.
C.
D.
133)   

Brass is an alloy of copper and which other element?

A.
B.
C.
D.
134)   

The main purpose of tempering is to reduce which property?

A.
B.
C.
D.
135)   

Which property makes aluminum ideal for aircraft construction? 

A.
B.
C.
D.
136)   

Cast iron is commonly used for machine parts due to its:

A.
B.
C.
D.
137)   

Why is alloy steel stronger than carbon steel? 

A.
B.
C.
D.
138)   

What is the purpose of seasoning timber?

A.
B.
C.
D.
139)   

What does UCT represent in steel heat treatment? 

A.
B.
C.
D.
140)   

Which of the following is commonly used as an electrical insulating material?

A.
B.
C.
D.
141)   

Quenching is primarily used to:

A.
B.
C.
D.
142)   

Which element is commonly added to steel to improve corrosion resistance?

A.
B.
C.
D.
143)   

Vulcanization of rubber improves its: 

A.
B.
C.
D.
144)   

Ductile iron is preferred over cast iron because of its:

A.
B.
C.
D.