Explore topic-wise MCQs in Heat Transfer.

This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Heat Transfer knowledge and support exam preparation. Choose a topic below to get started.

1.

Consider the above problem, find the value of Nusselt number

A. 40.46
B. 50.56
C. 60.66
D. 70.76
Answer» B. 50.56
Discussion
2.

The oil pan of 1.6 engine approximates a flat plate 0.3 m wide by 0.45 m long and protrudes below the framework of the automobile. The engine oil is at 95 degree Celsius and the ambient air temperature is 35 degree Celsius. If the automobile runs at 36 km/hr, make calculations for the rate of heat transfer from the oil-pan surface. Assume negligible resistance to conduction through the oil pan

A. 190.37 W
B. 180.37 W
C. 170.37 W
D. 160.37 W
Answer» D. 160.37 W
Discussion
3.

Investigate the effect of following condition on the average value of heat transfer coefficient in flow through a tube
Two fold increases in flow velocity by varying mass flow rate

A. nIt may be presumed that there is no change in the temperature of the liquid and the tube wall, and that the flow through the tube is turbulent in character
B. 64.1% decrease
C. 64.1% increase
D. 74.1%decrease
E. 74.1% increases
Answer» E. 74.1% increases
Discussion
4.

Which of the following is true for turbulent flow?

A. G <sub>r </sub>P <sub>r</sub> &gt; 10<sup>8</sup>
B. G <sub>r </sub>P <sub>r</sub> &gt; 10<sup>9</sup>
C. G <sub>r </sub>P <sub>r</sub> &gt; 10<sup>3</sup>
D. G <sub>r </sub>P <sub>r</sub> &gt; 10<sup>15</sup>
Answer» C. G <sub>r </sub>P <sub>r</sub> &gt; 10<sup>3</sup>
Discussion