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

176)   

Which metal has the best corrosion resistance? 

A.
B.
C.
D.
Answer: A
177)   

The critical cooling rate is the rate required to: 

A.
B.
C.
D.
Answer: B
178)   

The key property of an electrical insulator is: 

A.
B.
C.
D.
Answer: A
179)   

During tempering, martensite transforms into: 

A.
B.
C.
D.
Answer: D
180)   

Rubber exhibits high elasticity due to: 

A.
B.
C.
D.
Answer: A
181)   

High-carbon steel is characterized by: 

A.
B.
C.
D.
Answer: B
182)   

What is the main objective of the normalizing process? 

A.
B.
C.
D.
Answer: D
183)   

Which of the following is a key property of copper?

A.
B.
C.
D.
Answer: A
184)   

Which of these is NOT an electrical insulator?

A.
B.
C.
D.
Answer: C
185)   

Martensite is formed during: 

A.
B.
C.
D.
Answer: B
186)   

Compared to metals, the elastic modulus of rubber is: 

A.
B.
C.
D.
Answer: B
187)   

Hardenability of steel depends on: 

A.
B.
C.
D.
Answer: D
188)   

Softwoods differ from hardwoods because they:

A.
B.
C.
D.
Answer: A
189)   

Annealing improves: 

A.
B.
C.
D.
Answer: A
190)   

Vulcanization of rubber involves: 

A.
B.
C.
D.
Answer: A
191)   

Which alloying element is commonly added to steel to improve its cutting ability? 

A.
B.
C.
D.
Answer: B
192)   

The durability of timber depends on: 

A.
B.
C.
D.
Answer: D
193)   

Which heat treatment process increases the hardness of steel the most?

A.
B.
C.
D.
Answer: A
194)   

Which non-ferrous metal is preferred for making electrical conductors? 

A.
B.
C.
D.
Answer: A
195)   

Cast iron contains carbon in the range of:

A.
B.
C.
D.
Answer: B
196)   

The tempering temperature for hardened steel usually ranges between: 

A.
B.
C.
D.
Answer: B
197)   

Stainless steel gets its corrosion resistance primarily from: 

A.
B.
C.
D.
Answer: A
198)   

Which of the following is used as a timber preservative? 

A.
B.
C.
D.
Answer: D
199)   

Hardening of steel increases:

A.
B.
C.
D.
Answer: A
200)   

Rubber has low thermal conductivity because: 

A.
B.
C.
D.
Answer: A