Discussion
Home ‣ Mechanical Engineering ‣ Heat Transfer, Refrigeration and Air Conditioning Comments
- Question
The heat transfer by conduction through a thick sphere is given by
Options- A.
- B.
- C.
- D.
- Correct Answer
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- 1. The ratio of the volume of free air delivery per stroke to the swept volume of the piston, is known as
Options- A. compressor efficiency
- B. volumetric efficiency
- C. isothermal efficiency
- D. mechanical efficiency Discuss
- 2. The rotary compressors are suitable for large discharge of air at low pressure.
Options- A. True
- B. False Discuss
- 3. Intercooling in gas turbines
Options- A. decreases net output but increases thermal efficiency
- B. increases net output but decreases thermal efficiency
- C. decreases net output and thermal efficiency both
- D. increases net output and thermal efficiency both Discuss
- 4. A large clearance Volume in a reciprocating compressor results in
Options- A. reduced volume flow rate
- B. increased volume flow rate
- C. lower suction pressure
- D. lower delivery pressure Discuss
- 5. An axial compressor gives optimum performance at high speeds and large volume flows.
Options- A. Agree
- B. Disagree Discuss
- 6. The wet bulb temperature during sensible heating of air
Options- A. remains constant
- B. increases
- C. decreases Discuss
- 7. During sensible cooling of air __________ decreases.
Options- A. wet bulb temperature
- B. relative humidity
- C. dry bulb temperature
- D. specific humidity Discuss
- 8. The relative humidity decreases as air gets wet.
Options- A. True
- B. False Discuss
- 9. An electrolux refrigerator is called a __________ absorption system.
Options- A. single fluid
- B. two fluids
- C. three fluids Discuss
- 10. The heat transfer by radiation __________ a medium.
Options- A. requires
- B. does not require Discuss
Heat Transfer, Refrigeration and Air Conditioning problems
Search Results
Correct Answer: volumetric efficiency
Correct Answer: True
Correct Answer: increases net output but decreases thermal efficiency
Correct Answer: reduced volume flow rate
Correct Answer: Agree
Correct Answer: increases
Correct Answer: dry bulb temperature
Correct Answer: True
Correct Answer: three fluids
Correct Answer: does not require
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