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AAI Technical Rapid Quiz-18

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Question 1

Which of the following surface hardening processes needs no quenching?

Question 2

S1: Tendency of flow separation across a cylinder increases with increase in velocity.
S2: Flow separation is highly irregular and characterized by large number of eddies.

Question 3

In fins, heat transfer increases due to

Question 4

When the frictional force helps to apply the brake, then the brake is said to be______.

Question 5

Shot peening is done on chaplets to

Question 6

An aqua ammonia vapor absorption refrigeration uses ________ as a refrigerant.

Question 7

In thermal power plants, the deaerator is used mainly to______

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