Q. (NGr × NPr) is called the __________ number.
✅ Correct Answer: (D)
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Heat Transfer MCQs | Page - 6
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. A fluid is flowing inside the inner tube of a double pipe heat exchanger with diameter 'd'. For a fixed mass flow rate, the tube side heat transfer co-efficient for turbulent flow conditions is proportional to
✅ Correct Answer: (B)
D0.2
Q. The thermal radiative flux from a surface of emissivity = 0.4 is 22.68 kW/m2. The approximate surface temperature (K) is
(Stefan-Boltzman constant = 5.67 × 10-8 W/m2.K4)
(Stefan-Boltzman constant = 5.67 × 10-8 W/m2.K4)
✅ Correct Answer: (C)
1000
Q. Heat transfer by radiation between two bodies at T1 & T2 and in an ambient temperature of Ta°C depends on
✅ Correct Answer: (D)
None of these
Q. Which of the following is correct?
✅ Correct Answer: (A)
Driving force = Rate × Resistance
Q. Double pipe heat exchangers are used
✅ Correct Answer: (B)
When heat transfer area required is very low, i.e (100 - 200 ft2)
Q. Loss of heat from untagged steam pipe to the ambient air is by
✅ Correct Answer: (D)
All of the above
Q. A hot liquid is kept in a big room. The logorithm of the numerical value of the temperature difference between the liquid and the room is plotted against time. The plot will be very nearly a/an
✅ Correct Answer: (B)
Straight line
Q. Crystal size in a continuous crystalliser depends upon the
✅ Correct Answer: (D)
All of the above
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