Q. For heat flow through very thick walled cylinder, use____mean radius.
✅ Correct Answer: (B)
Logarithmic
Heat Transfer MCQs | Page - 7
Dear candidates you will find MCQ questions of Heat Transfer here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
Q. In a shell and tube heat exchanger, the height of 25 percent cut baffles is equal to (where, D = inside diameter of shell)
✅ Correct Answer: (C)
0.75 D
Q. Tube pitch is the __________ of tube diameters and the clearances.
✅ Correct Answer: (A)
Sum
Q. Latent heat absorbed by 1 lb of water at 212°F, when it is changed to steam at 212°F, may be around __________ BTU.
✅ Correct Answer: (B)
180
Q. Sensible heat absorbed by 1 lb of water when it is heated from 32 to 212°F may be around __________ BTU.
✅ Correct Answer: (A)
180
Q. When the ratio of the Grashoff number and to the square of Reynolds number is one, the dominant mechanism of heat transfer is
✅ Correct Answer: (C)
Mixed convection (both free and forced)
Q. With increase in temperature, the thermal conductivity of non-metallic amorphous solids
✅ Correct Answer: (B)
Increases
Q. What is the thermal conductivity of a perfect heat insulator?
✅ Correct Answer: (A)
Zero
Q. Multiple effect evaporators ar used to
✅ Correct Answer: (B)
Increase the steam economy & the capacity
Q. Pick out the wrong statement.
✅ Correct Answer: (A)
Overall heat transfer co-efficient in a heat exchanger is controlled by the value of the film co-efficient, which is higher
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