Compressors, Gas Dynamics and Gas Turbines Questions And Answers.

1.In a four stage compressor, if the pressure at the first and third stage are 1 bar and 16 bar, then the delivery pressure at the fourth stage will be
A. 1 bar
B. 16 bar
C. 64 bar
D. 256 bar

2.The compressed air may be used
A. in gas turbine plants
B. for operating pneumatic drills
C. in starting and supercharging of I.C. engines
D. all of the above

3.A rocket works with maximum overall efficiency when air-craft velocity is __________ the jet velocity.
A. equal to
B. one-half
C. double
D. all of above

4.The volumetric efficiency for reciprocating air compressors is about
A. 10 to 40%
B. 40 to 60%
C. 60 to 70%
D. 70 to 90%

5.The maximum temperature in a gas turbine is
A. 200C
B. 500C
C. 700C
D. 1000C

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