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

126)   

Why is cast iron considered brittle?

A.
B.
C.
D.
Answer: A
127)   

What happens to steel after annealing? 

A.
B.
C.
D.
Answer: A
128)   

Which of the following is classified as hardwood?

A.
B.
C.
D.
Answer: A
129)   

Which material is widely used for thermal insulation in buildings?

A.
B.
C.
D.
Answer: A
130)   

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

A.
B.
C.
D.
Answer: A
131)   

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

A.
B.
C.
D.
Answer: A
132)   

Normalizing steel improves which property?

A.
B.
C.
D.
Answer: C
133)   

Brass is an alloy of copper and which other element?

A.
B.
C.
D.
Answer: B
134)   

The main purpose of tempering is to reduce which property?

A.
B.
C.
D.
Answer: B
135)   

Which property makes aluminum ideal for aircraft construction? 

A.
B.
C.
D.
Answer: A
136)   

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

A.
B.
C.
D.
Answer: B
137)   

Why is alloy steel stronger than carbon steel? 

A.
B.
C.
D.
Answer: A
138)   

What is the purpose of seasoning timber?

A.
B.
C.
D.
Answer: A
139)   

What does UCT represent in steel heat treatment? 

A.
B.
C.
D.
Answer: A
140)   

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

A.
B.
C.
D.
Answer: A
141)   

Quenching is primarily used to:

A.
B.
C.
D.
Answer: A
142)   

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

A.
B.
C.
D.
Answer: A
143)   

Vulcanization of rubber improves its: 

A.
B.
C.
D.
Answer: D
144)   

Ductile iron is preferred over cast iron because of its:

A.
B.
C.
D.
Answer: B
145)   

Which method is used to prevent timber decay?

A.
B.
C.
D.
Answer: D
146)   

Low-carbon steel is also known as: 

A.
B.
C.
D.
Answer: A
147)   

The purpose of annealing is to: 

A.
B.
C.
D.
Answer: A
148)   

Which non-ferrous metal is known for its excellent thermal conductivity?

A.
B.
C.
D.
Answer: A
149)   

Which phase is present in steel below the lower critical temperature (LCT)? 

A.
B.
C.
D.
Answer: A
150)   

Which material is the best insulator in high-voltage applications?

A.
B.
C.
D.
Answer: D