Home
Home >> Engineering>> Mechanical Engineering>> Heat & Mass Transfer

Heat & Mass Transfer MCQ Question with Answer

Heat & Mass Transfer MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

Download Heat & Mass Transfer MCQ Question Answer PDF

Question No : 43
A heat exchanger with heat transfer surface area A and overall heat transfer coefficient U handles two fluids of heat capacities Cmax and Cmin. The number of transfer units (NTU) used in the analysis of heat exchanger is specified as

A.Cmin/U
U/A.Cmin
A.U.Cmin
A.U/Cmin
View Answer   Discuss

Question No : 44
In free convection heat transfer, Nusselt number is function of

Grashoff number and Reynold number
Grashoff number and Prandtl number
Prandtl number and Reynold number
Grashoff number, Prandtl number and Reynold number
View Answer   Discuss

Question No : 45
Depending on the radiating properties, a body will be opaque when

P = 0, x = 0 and a = 1
P=1, x = 0 and a = 0
P = 0, x = 1 and a = 0
X = 0, a + p = 1 Where a = absorptivity, p = reflectivity, X = transmissivity.
View Answer   Discuss

Question No : 46
The value of the wavelength for maximum emissive power is given by

Wien's law
Planck's law
Stefan's law
Fourier's law
View Answer   Discuss

Question No : 47
According to Kirchoff's law, the ratio of emissive power to absorptivity for all bodies is equal to the emissive power of a

Grey body
Brilliant white polished body
Red hot body
Black body
View Answer   Discuss

Question No : 48
The heat transfer takes place according to

Zeroth law of thermodynamics
First law of thermodynamics
Second law of thermodynamics
Kirchhoff's law
View Answer   Discuss

Question No : 49
Free convection flow depends on

Density
Coefficient of viscosity
Gravitational force
All of these
View Answer   Discuss