MCQ - TNPSC JTO
JTO - 540 - Trade - Workshop Calculation Science
540 Unit 2 Material Science and Heat Treatment
177)
The critical cooling rate is the rate required to:
A.
B.
C.
D.
178)
The key property of an electrical insulator is:
A.
B.
C.
D.
179)
During tempering, martensite transforms into:
A.
B.
C.
D.
180)
Rubber exhibits high elasticity due to:
A.
B.
C.
D.
181)
High-carbon steel is characterized by:
A.
B.
C.
D.
182)
What is the main objective of the normalizing process?
A.
B.
C.
D.
183)
Which of the following is a key property of copper?
A.
B.
C.
D.
184)
Which of these is NOT an electrical insulator?
A.
B.
C.
D.
185)
Martensite is formed during:
A.
B.
C.
D.
186)
Compared to metals, the elastic modulus of rubber is:
A.
B.
C.
D.
187)
Hardenability of steel depends on:
A.
B.
C.
D.
188)
Softwoods differ from hardwoods because they:
A.
B.
C.
D.
189)
Annealing improves:
A.
B.
C.
D.
190)
Vulcanization of rubber involves:
A.
B.
C.
D.
191)
Which alloying element is commonly added to steel to improve its cutting ability?
A.
B.
C.
D.
192)
The durability of timber depends on:
A.
B.
C.
D.