Discussion
Home ‣ Mechanical Engineering ‣ Compressors, Gas Dynamics and Gas Turbines Comments
- Question
The pressure ratio in a centrifugal compressor can be increased by increasing the tip speed and lowering the inlet temperature.
Options- A. Correct
- B. Incorrect
- Correct Answer
- Correct
- 1. In jet propulsion power unit, the inlet duct of diverging shape is used for converting kinetic energy of air into pressure energy.
Options- A. True
- B. False Discuss
- 2. A rocket engine uses __________ for the combustion of its fuel.
Options- A. surrounding air
- B. compressed atmospheric air
- C. its own oxygen
- D. none of these Discuss
- 3. Workdone by an air compressor __________ upon the way in which the air is compressed.
Options- A. depends
- B. does not depend Discuss
- 4. The compressor capacity will be __________ if the temperature of intake air is lowest.
Options- A. lowest
- B. highest Discuss
- 5. Reheating in a gas turbine
Options- A. increases the thermal efficiency
- B. increases the compressor work
- C. increases the turbine work
- D. decreases the thermal efficiency Discuss
- 6. A closed cycle gas turbine consists of a
Options- A. compressor
- B. heating chamber
- C. cooling chamber
- D. all of these Discuss
- 7. The ratio of the net work obtained from the gas turbine plant to the turbine work is known as
Options- A. compression ratio
- B. work ratio
- C. pressure ratio
- D. none of these Discuss
- 8. The operation of lifts, rams and pumps make use of compressed air.
Options- A. Yes
- B. No Discuss
- 9. A machine used to raise the pressure of air is called
Options- A. gas turbine
- B. I.C engine
- C. compressor
- D. air motor Discuss
- 10. In a jet engine, the compression varies as the square of the speed.
Options- A. Correct
- B. Incorrect Discuss
Compressors, Gas Dynamics and Gas Turbines problems
Search Results
Correct Answer: True
Correct Answer: its own oxygen
Correct Answer: depends
Correct Answer: highest
Correct Answer: increases the thermal efficiency
Correct Answer: all of these
Correct Answer: work ratio
Correct Answer: Yes
Correct Answer: compressor
Correct Answer: Correct
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