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MCQ - Mechanical TNPSC JTO
JTO - 436 - Fitter - 436 - Unit VIII Metals Metal Non Metal

176)   

The main purpose of annealing is to ______.

A.
B.
C.
D.
Answer: B
177)   

Normalizing is similar to annealing except that cooling is done in ______.

A.
B.
C.
D.
Answer: B
178)   

Normalizing produces a structure that is ______.

A.
B.
C.
D.
Answer: B
179)   

Hardening of steel is achieved by ______.

A.
B.
C.
D.
Answer: A
180)   

In hardening, rapid cooling of steel is called ______.

A.
B.
C.
D.
Answer: B
181)   

Martensite is formed in steel during ______.

A.
B.
C.
D.
Answer: C
182)   

Hardening makes steel ______.

A.
B.
C.
D.
Answer: C
183)   

Tempering is always carried out after ______.

A.
B.
C.
D.
Answer: B
184)   

The main purpose of tempering is to ______.

A.
B.
C.
D.
Answer: A
185)   

During tempering, the steel is reheated to ______.

A.
B.
C.
D.
Answer: B
186)   

Low temperature tempering of hardened steel increases ______.

A.
B.
C.
D.
Answer: B
187)   

High temperature tempering results in ______.

A.
B.
C.
D.
Answer: C
188)   

If hardened steel is not tempered, it will be ______.

A.
B.
C.
D.
Answer: C
189)   

The cooling medium used in hardening depends on ______.

A.
B.
C.
D.
Answer: D
190)   

In heat treatment, slow cooling of steel in furnace is known as ______.

A.
B.
C.
D.
Answer: B
191)   

The slowest cooling rate during heat treatment is obtained in ______.

A.
B.
C.
D.
Answer: D
192)   

The fastest cooling rate during quenching is obtained in ______.

A.
B.
C.
D.
Answer: C
193)   

Which structure of steel is softest?

A.
B.
C.
D.
Answer: C
194)   

Annealing is generally done to ______.

A.
B.
C.
D.
Answer: B
195)   

In normalizing, steel is heated about ______ above its critical temperature.

A.
B.
C.
D.
Answer: B
196)   

Normalizing removes ______ in steel.

A.
B.
C.
D.
Answer: B
197)   

Which quenching medium gives moderate cooling rate?

A.
B.
C.
D.
Answer: B
198)   

After hardening, steel becomes very brittle because of ______.

A.
B.
C.
D.
Answer: B
199)   

The temperature for tempering hardened steel usually lies between ______.

A.
B.
C.
D.
Answer: A
200)   

Tempering at low temperature (150–300 °C) produces structure called ______.

A.
B.
C.
D.
Answer: B