Discussion
Home ‣ Mechanical Engineering ‣ Compressors, Gas Dynamics and Gas Turbines Comments
- Question
A jet engine has
Options- A. no propeller
- B. propeller in front
- C. propeller at back
- D. propeller on the top
- Correct Answer
- no propeller
- 1. A gas turbine used in air-craft should have low weight and small frontal area.
Options- A. Correct
- B. Incorrect Discuss
- 2. A receiver in compressor installations is used to damp pressure waves in compressor discharge.
Options- A. Yes
- B. No Discuss
- 3. In a compressor, work is done on the piston during suction of air and work is done by the piston during compression as well as delivery of air.
Options- A. Agree
- B. Disagree Discuss
- 4. Maximum work is saved in a two stage reciprocating air compressor with incomplete intercooling.
Options- A. Agree
- B. Disagree Discuss
- 5. The air is delivered __________ in one revolution in case of a three-lobbed rotor.
Options- A. two times
- B. three times
- C. four times
- D. six times Discuss
- 6. In a compressed air system, the temperature of air discharged from the air motor is __________ than the initial compressor intake temperature.
Options- A. more
- B. less Discuss
- 7. The compressor efficiency is defined as the ratio of volume of free air delivery per stroke to the swept volume of the piston.
Options- A. Correct
- B. Incorrect Discuss
- 8. Euler's equation can be used for
Options- A. radial flow compressors
- B. axial flow compressors
- C. pumps
- D. all of these Discuss
- 9. The temperature of air at the beginning of the compression stroke is __________ the atmospheric temperature.
Options- A. equal to
- B. less than
- C. more than Discuss
- 10. The overall efficiency of the compressed air system is the
Options- A. ratio of shaft output of the air motor to the shaft input to the compressor
- B. ratio of shaft input to the compressor to the shaft output of air motor
- C. product of shaft output of air motor and shaft input to the compressor
- D. none of the above Discuss
Compressors, Gas Dynamics and Gas Turbines problems
Search Results
Correct Answer: Correct
Correct Answer: Yes
Correct Answer: Agree
Correct Answer: Disagree
Correct Answer: six times
Correct Answer: less
Correct Answer: Incorrect
Correct Answer: all of these
Correct Answer: more than
Correct Answer: ratio of shaft output of the air motor to the shaft input to the compressor
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