Explore topic-wise MCQs in Heat Transfer.

This section includes 7 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.

If is less than zero, then with respect to the relation k = k0 (1 + t), conductivity depends on surface area .

A. True
B. False
Answer» C.
Discussion
2.

The temperatures on the two sides of a plane wall are t1 and t2 and thermal conductivity of the wall material is prescribed by the relationK = k0 e (-x/ )

A. nWhere, k<sub>0</sub> is constant and is the wall thickness. Find the relation for temperature distribution in the wall?
B. t <sub>1</sub> t <sub>x </sub>/ t <sub>1</sub> t <sub>2</sub> = x
C. t <sub>1</sub> t <sub>x </sub>/ t <sub>1</sub> t <sub>2</sub> =
D. t <sub>1</sub> t <sub>x </sub>/ t <sub>1</sub> t <sub>2</sub> = /x
E. t <sub>1</sub> t <sub>x </sub>/ t <sub>1</sub> t <sub>2</sub> = x/
Answer» E. t <sub>1</sub> t <sub>x </sub>/ t <sub>1</sub> t <sub>2</sub> = x/
Discussion
3.

The unit of thermal conductivity doesn t contain which parameter?

A. Watt
B. Pascal
C. Meter
D. Kelvin
Answer» C. Meter
Discussion
4.

If is greater than zero, then choose the correct statement with respect to given relationk = k0 (1 + t)

A. k doesn t depend on temperature
B. k depends on temperature
C. k is directly proportional to t
D. Data is insufficient
Answer» D. Data is insufficient
Discussion
5.

With respect to the equation k = k0 (1 + t) which is true if we put = 0?

A. Slope of temperature curve is constant
B. Slope of temperature curve does not change
C. Slope of temperature curve increases
D. Slope of temperature curve is decreases
Answer» B. Slope of temperature curve does not change
Discussion
6.

A plane wall of thickness has its surfaces maintained at temperatures T1 and T2. The wall is made of a material whose thermal conductivity varies with temperature according to the relation k = k0 T2. Find the expression to work out the steady state heat conduction through the wall?

A. Q = 2A k<sub>0</sub> (T <sub>1 </sub><sup>3</sup> T <sub>2 </sub><sup>3</sup>)/3
B. Q = A k<sub>0</sub> (T <sub>1 </sub><sup>3</sup> T <sub>2 </sub><sup>3</sup>)/3
C. Q = A k<sub>0</sub> (T <sub>1 </sub><sup>2</sup> T <sub>2 </sub><sup>2</sup>)/3
D. Q = A k<sub>0</sub> (T <sub>1</sub> T <sub>2</sub>)/3
Answer» C. Q = A k<sub>0</sub> (T <sub>1 </sub><sup>2</sup> T <sub>2 </sub><sup>2</sup>)/3
Discussion
7.

The inner and outer surfaces of a furnace wall, 25 cm thick, are at 300 degree Celsius and 30 degree Celsius. Here thermal conductivity is given by the relationK = (1.45 + 0.5 * 10-5 t2) KJ/m hr deg

A. nWhere, t is the temperature in degree centigrade. Calculate the heat loss per square meter of the wall surface area?
B. 1355.3 kJ/m<sup>2</sup> hr
C. 2345.8 kJ/m<sup>2</sup> hr
D. 1745.8 kJ/m<sup>2</sup> hr
E. 7895.9 kJ/m<sup>2</sup> hr
Answer» D. 1745.8 kJ/m<sup>2</sup> hr
Discussion