Discussion
Home ‣ Mechanical Engineering ‣ Heat Transfer, Refrigeration and Air Conditioning Comments
- Question
The product of Reynolds number and Prandtl number is known as
Options- A. Stanton number
- B. Biot number
- C. Peclet number
- D. Grashoff number
- Correct Answer
- Peclet number
- 1. The relative humidity __________ as air gets drier.
Options- A. increases
- B. decreases Discuss
- 2. A device used for transfering heat from one fluid to another is called heat exchanger.
Options- A. True
- B. False Discuss
- 3. Most air cooled condensers are designed to operate with a temperature difference of
Options- A. 5°C
- B. 8°C
- C. 14°C
- D. 22°C Discuss
- 4. The leakage in a refrigeration system using freon is detected by
Options- A. halide torch
- B. sulphur sticks
- C. soap and water
- D. all of these Discuss
- 5. The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body. This statement is known as
Options- A. Wien's law
- B. Stefan's law
- C. Kirchhoff's law
- D. Planck's law Discuss
- 6. The boiling point of ammonia is
Options- A. -10.5°C
- B. -30°C
- C. -33.3°C
- D. -77.7°C Discuss
- 7. A Bell Coleman refrigerator working on dense air system as compared to open air system, for the same range of temperature, results in higher coefficient of performance.
Options- A. Agree
- B. Disagree Discuss
- 8. During humidification process, dry bulb temperature
Options- A. remains constant
- B. increases
- C. decreases Discuss
- 9. The condition of refrigerant after passing through the condenser in a vapour compression system is
Options- A. saturated liquid
- B. wet vapour
- C. dry saturated vapour
- D. superheated vapour Discuss
- 10. Fourier's law of heat conduction gives the heat flow for
Options- A. irregular surfaces
- B. non-uniform temperature surfaces
- C. one dimensional cases only
- D. two dimensional cases only Discuss
Heat Transfer, Refrigeration and Air Conditioning problems
Search Results
Correct Answer: increases
Correct Answer: True
Correct Answer: 14°C
Correct Answer: halide torch
Correct Answer: Kirchhoff's law
Correct Answer: -33.3°C
Correct Answer: Agree
Correct Answer: remains constant
Correct Answer: saturated liquid
Correct Answer: one dimensional cases only
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