February 9, 2014

MECHANICAL ENGINEERING JOB INTERVIEW QUESTIONS

1.). What is factor of evaporation ?

Ans: It is the ratio of heat change from feed water to steam and the heat of vaporization of steam at atmospheric pressure.

2.)Which parameters influence the performance of gas turbines ?

Ans: Ambient conditions, inlet/exhaust pressure losses, fuels, and water/steam injection flow rates'influence the performance of gas turbines.

3.)Why steam is in open space and water inside tube in condensers used in power plants ?

Ans: Overall heat transfer coefficient can be increased by increasing velocity of water in tube. Further steam needs more space due to higher specific volume.

4.)What is radiosity ?

Ans: It is the rate at which radiation leaves a surface.

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