Top 1000+ Solved Heat Transfer (HT) MCQ Questions Answer
Q. Temperature profile in steady state heat transfer is
a. Asymptotic
b. Hyperbolic
c. Parabolic
d. Linear
Q. Which of the following parameters is increased by use of finned tube in a multipass shelland tube heat exchanger?
a. Tube side pressure drop and the heat transfer rate
b. Convective heat transfer co-efficient
c. Effective tube surface area for convective heat transfer
d. All (A) (B) and (C)
Q. Economy of a multiple effect evaporator depends upon the
a. Heat balance consideration
b. Rate of heat transfer
c. Both (A) and (B)
d. Neither (A) nor (B)
Q. The main purpose of providing fins on heat transfer surface is to increase the
a. Temperature gradient
b. Mechanical strength of the equipment
c. Heat transfer area
d. Heat transfer co-efficient
Q. Wavelength corresponding to the maximum energy is inversely proportional to the absolute temperature. This is __________ law.
a. Stefan's
b. Dalton's
c. Wien's
d. Kirchoff’s
Q. Trap is used to remove __________ from steam pipe lines.
a. Steam
b. Condensate
c. Non-condensable
d. None of these
Q. Pick out the wrong statement:
a. With change in temperature, the radiant energy emitted by a black body remains unchanged
b. Absorptivity of a body approaches unity in case of diffuse reflection
c. Absorptivity of a perfectly black body is unity
d. Value of Stefan-Boltzmann constant is 4.876 × 10-8 KCal/m2 .hr.°K4
Q. Prandtl number is the ratio of
a. Momentum diffusivity to mass diffusivity
b. Momentum diffusivity to thermal diffusivity
c. Thermal diffusivity to mass diffusivity
d. Thermal diffusivity to momentum diffusivity
Q. When vaporisation takes place through a blanketting film of gas, the phenomenon is termed as __________ boiling.
a. Pool
b. Nucleate
c. Transition
d. Film
Q. Kg of liquid evaporated per hour in an evaporator is defined as its
a. Capacity
b. Economy
c. Steam load
d. None of these