Discussion
Home ‣ Mechanical Engineering ‣ Heat Transfer, Refrigeration and Air Conditioning Comments
- Question
Which of the following statement is wrong?
Options- A. The heat transfer in liquid and gases takes place according to convection.
- B. The amount of heat flow through a body is dependent upon the material of the body.
- C. The thermal conductivity of solid metals increases with rise in temperature,
- D. Logarithmic mean temperature difference is not equal to the arithmetic mean temperature difference.
- Correct Answer
- The thermal conductivity of solid metals increases with rise in temperature,
- 1. As relative humidity decreases, the dew point temperature will be __________ wet bulb temperature.
Options- A. same as
- B. lower than
- C. higher man Discuss
- 2. The heat transfer by conduction through a thick sphere is same as through a thick cylinder.
Options- A. True
- B. False Discuss
- 3. In a psychrometric process, the sensible heat added is 30 kJ/s and the latent heat added is 20 kJ/s. The sensible heat factor for the process will be
Options- A. 0.3
- B. 0.6
- C. 0.67
- D. 1.5 Discuss
- 4. For ammonia refrigerating systems, the tubes of a shell and tube condenser are made of
Options- A. copper
- B. aluminium
- C. steel
- D. brass Discuss
- 5. A water cooled condenser operates at a __________ condensing temperature than an air-cooled condenser.
Options- A. higher
- B. lower Discuss
- 6. During adiabatic saturation process on unsaturated air __________ remains constant.
Options- A. relative humidity
- B. dew point temperature
- C. dry bulb temperature
- D. wet bulb temperature Discuss
- 7. The tool made of cemented carbide wear out faster at
Options- A. slow speeds
- B. medium speeds
- C. fast speeds
- D. very fast speeds Discuss
- 8. The lead screw of a lathe has __________ threads.
Options- A. single start
- B. double start
- C. multi-start
- D. any one of these Discuss
- 9. The cutting tool in a milling machine is mounted on
Options- A. spindle
- B. arbor
- C. column
- D. knee Discuss
- 10. Drilling is an example of
Options- A. orthogonal cutting
- B. oblique cutting
- C. simple cutting
- D. uniform cutting Discuss
Heat Transfer, Refrigeration and Air Conditioning problems
Search Results
Correct Answer: lower than
Correct Answer: False
Correct Answer: 0.6
Correct Answer: steel
Correct Answer: lower
Correct Answer: wet bulb temperature
Correct Answer: slow speeds
Correct Answer: single start
Correct Answer: arbor
Correct Answer: oblique cutting
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