E-PolyLearning

Welcome to the largest collection of MCQs on the Internet. Access and Discuss these Multiple choice questions for various competitive Exams and Interviews.
1. Reynold's analogy states that
a. A
b. B
c. C
d. D
View Answer Report Discuss 50-50!
Answer: (a).A

2. The following equation, corresponds to __________ analogy.
a. Von-Karmann
b. Reynolds
c. Colburn
d. Prandtl
View Answer Report Discuss 50-50!
Answer: (d).Prandtl

3. Out of the following four assumptions used in the derivation of the equation for LMTD given by below equation, which one is subject to the largest deviation in practice ?
a. Constant overall heat transfer co-efficient.
b. Constant rate of fluid flow.
c. Constant specific heat.
d. No partial phase change in the system.
View Answer Report Discuss 50-50!
Answer: (b).Constant rate of fluid flow.

4. For flow over a flat plate, the ratio of thermal boundary layer thickness, 'xt' and hydrodynamic boundary layer thickness 'x' is equal to (where, NPr = Prandtl number)
a. A
b. B
c. C
d. D
View Answer Report Discuss 50-50!
Answer: (b).B

5. The interchange factor for radiation heat transfer from surface 'x' to surface 'y' in case of an infinite parallel planes with emis-sivities εx & εy is given by
a. A
b. B
c. C
d. D
View Answer Report Discuss 50-50!
Answer: (d).D

Page 1 of 106