Top 1000+ Solved Heat Transfer (HT) MCQ Questions Answer
Q. The equation, (NSt × N 2/3 Pr) = f/2, is the __________ analogy.
a. Colburn
b. Reynolds
c. Prandtl
d. None of these
Q. The range of electromagnetic spectrum important in heat transfer by radiation is__________ microns.
a. 0.38-0.78
b. 0.5-50
c. 100-1000
d. 5-50
Q. Stefan's block body radiation law can also be derived from __________ law.
a. Kirchoff’s
b. Planck's
c. Fourier's
d. None of these
Q. Boiling point of a solution according to Duhring's rule is a linear function of the__________ of water.
a. Boiling point (at the same pressure)
b. Viscosity
c. Density
d. Thermal conductivity
Q. Sensible heat absorbed by 1 lb of water when it is heated from 32 to 212°F may be around__________ BTU.
a. 180
b. 970
c. 3.97
d. Data insufficient, can't be predicted
Q. Pick out the wrong statement.
a. The emissivity of a surface decreases, if it gets corroded by atmospheric environment
b. The emissivity of a surface increases with increase in surface roughness
c. The emissivity of a polished surface is quite low
d. The emissivity of a non-metallic surface decreases with increase in the temperature
Q. Extremely large or small volumes of fluids are generally best routed through the shell sideof a shell and tube heat exchanger, because of the
a. Less corrosion problems
b. Flexibility possible in the baffle arrangement
c. Low pressure drop
d. High heat transfer co-efficient
Q. The purpose of providing expansion bellows in the shell of tubular exchanger is to
a. Increase the heating load
b. Impart structural strength
c. Account for the uneven expansion of shell and tube bundles
d. Facilitate increase of shell length, if needed
Q. An equipment which converts the latent or sensible heat of one fluid into the latent heat of vaporisation of another, is called a
a. Boiler
b. Heat exchanger
c. Recuperator
d. Regenerator
Q. Multipass heat exchangers are used
a. Because of simplicity of fabrication
b. For low heat load
c. To obtain higher heat transfer co-efficient and shorter tube
d. To reduce the pressure drop
Q. A black body does not __________ radiation.
a. Absorb or emit
b. Refract
c. Reflect
d. Both (B) & (C)