Compressors, Gas Dynamics and Gas Turbines problems
- 1. Air motors work on the cycle which is the reverse of the reciprocating air compressor cycle.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Agree
- 2. In gas turbines, the work input with intercooling is __________ the work input with no intercooling.
Options- A. less man
- B. more than Discuss
Correct Answer: less man
- 3. In reciprocating air compressors, isothermal efficiency is used for all sorts of calculations.
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Correct
- 4. The perfect intercooling, in multistage compression, means that the temperature of air at inlet to subsequent stages is equal to the initial temperature.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Agree
- 5. For perfect intercooling in a three stage compressor,
Options- A.
- B.
- C. p1p2 = p3p4
- D. p1p3 = p2p4 Discuss
Correct Answer:
- 6. In a single acting reciprocating air compressor, without clearance, the compression of air may be
Options- A. isothermal
- B. polytropic
- C. isentropic
- D. any one of these Discuss
Correct Answer: any one of these
- 7. In open cycle turbo-jet engines used in military aircraft, reheating the exhaust gas from the turbine by burning, more fuel is used to increase the
Options- A. thrust and range of aircraft
- B. efficiency of the engine
- C. both (a) and (b)
- D. none of these Discuss
Correct Answer: thrust and range of aircraft
- 8. The efficiency of roots blower __________ with the increase in pressure ratio.
Options- A. decreases
- B. increases
- C. does not change Discuss
Correct Answer: decreases
- 9. A closed cycle gas turbine works on
Options- A. Carnot cycle
- B. Rankine cycle
- C. Ericsson cycle
- D. Joule cycle Discuss
Correct Answer: Joule cycle
- 10. The clearance, in a single stage, single acting reciprocating air compressor does not effect the workdone on the air and the power required for compressing the air.
Options- A. True
- B. False Discuss
Correct Answer: True
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