Chemical Engineering - Chemical Engineering Basics

36. 

Nitriding of steel is a process for

A. case hardening
B. spheroidising
C. normalising
D. annealing

Answer: Option A

Explanation:

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37. 

The maximum percentage of chromium that can be added to steel is about

A. 12
B. 18
C. 24
D. 30

Answer: Option B

Explanation:

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38. 

Holes in a plate for rivetted joints is preferably made by

A. drilling
B. tapping
C. reaming
D. punching

Answer: Option A

Explanation:

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39. 

The temperature at which a gas, when subjected to Joule-Thomson expansion, neither cools or heats up, is termed as the __________ temperature. Above this temperature the gas heats up on throttling and below this the gas cools down.

A. isotactic
B. saturation
C. inversion
D. throttling

Answer: Option C

Explanation:

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40. 

Source of heat supply in a cupola is

A. coke
B. charcoal
C. lumpy coal
D. pulverised coal

Answer: Option A

Explanation:

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