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one of the following is main disadvantage of flame hardeing process of nsurface hardeing?


A) possibility of over heating and grain growth
B) close control over case depth is not possible
C) mostly suitable or symmetri components only
D) all of the above

E) A) and D)
F) B) and C)

Correct Answer

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D

the pearlitic microstructure which is obtain after patenting process is suitable to which manufacturing process


A) casting of cylindrical block
B) forging of cam shaft
C) drawing of wires
D) all of the above

E) None of the above
F) C) and D)

Correct Answer

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C

out of the following methods ,one is method used flame hardening process?


A) stationary method
B) circular and progressive method
C) spiral and progressive method
D) all of the above

E) A) and B)
F) All of the above

Correct Answer

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Due to one of the reason given below,give rise to quench cracking?


A) improper quenching medium
B) improper selection of steel
C) improper design of component
D) all of the above

E) A) and D)
F) A) and C)

Correct Answer

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for induction hardening process,the heat source is a …..


A) induction coil carrying current
B) heating coil carrying current
C) metallic probes carrying current
D) none of the above

E) A) and B)
F) None of the above

Correct Answer

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A

dispersion hardening materials can be produced with the help of ……process


A) forging
B) rolling
C) powder metallurgy
D) none of the above

E) A) and B)
F) All of the above

Correct Answer

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