Discussion
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- Question
The ratio of workdone per cycle to the stroke volume of the compressor is known as
Options- A. compressor capacity
- B. compression ratio
- C. compressor efficiency
- D. mean effective pressure
- Correct Answer
- mean effective pressure
- 1. The compressed air may be used
Options- A. in gas turbine plants
- B. for operating pneumatic drills
- C. in starting and supercharging of I.C. engines
- D. all of the above Discuss
- 2. The volume of air delivered by the compressor is called
Options- A. free air delivery
- B. compressor capacity
- C. swept volume
- D. none of these Discuss
- 3. The compression ratio in a gas turbine is
Options- A. 4
- B. 1
- C. 9
- D. 12 Discuss
- 4. The degree of reaction in an axial flow compressor is defined as the ratio of static enthalpy rise in the
Options- A. rotor to static enthalpy rise in the stator
- B. stator to static enthalpy rise in the rotor
- C. rotor to static enthalpy rise in the stage
- D. stator to static enthalpy rise in the stage Discuss
- 5. A rocket works with maximum overall efficiency when air-craft velocity is __________ the jet velocity.
Options- A. equal to
- B. one-half
- C. double Discuss
- 6. Which of the following statement is correct?
Options- A. The ratio of the discharge pressure to the inlet pressure of air is called compressor efficiency.
- B. The compression ratio for the compressor is always greater than unity.
- C. The compressor capacity is the ratio of workdone per cycle to the stroke volume.
- D. During isothermal compression of air, the workdone in a compressor is maximum. Discuss
- 7. The clearance volume in the compressor is kept minimum because it effects on volumetric efficiency.
Options- A. Correct
- B. Incorrect Discuss
- 8. When the temperature of air leaving the intercooler, in a two stage compression with intercooler, is __________ the original atmospheric air temperature, then the intercooling is known as perfect or complete intercooling.
Options- A. equal to
- B. less than
- C. more than Discuss
- 9. The increase in pressure in a vane blower takes place first due to compression and then due to back flow of air.
Options- A. Correct
- B. Incorrect Discuss
- 10. Intercooling in multi-stage compressors is done
Options- A. to cool the air during compression
- B. to cool the air at delivery
- C. to enable compression in two stages
- D. to minimise the work of compression Discuss
Compressors, Gas Dynamics and Gas Turbines problems
Search Results
Correct Answer: all of the above
Correct Answer: compressor capacity
Correct Answer: 1
Correct Answer: rotor to static enthalpy rise in the stage
Correct Answer: one-half
Correct Answer: The compression ratio for the compressor is always greater than unity.
Correct Answer: Correct
Correct Answer: equal to
Correct Answer: Correct
Correct Answer: to minimise the work of compression
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