Top 1000+ Solved Heat Transfer (HT) MCQ Questions Answer
Q. The purpose of providing bleed points in the evaporator is to
a. Admit the feed
b. Remove the product
c. Facilitate removal of non-condensable gases
d. Create vacuum
Q. Choose the most important factor on which the heat conducted through a wall in a unittime will depend on?
a. Thickness of the wall
b. Area of the wall perpendicular to heat flow
c. Material of the wall
d. Temperature difference between the two surfaces of the wall
Q. With increase in temperature, the thermal conductivity of steel
a. Increases
b. Decreases
c. Remains unchanged
d. Increases exponentially
Q. Film boiling occurs at __________ pressure.
a. Atmospheric
b. Sub-atmospheric
c. Negative
d. Very high
Q. In a shell and tube heat exchanger, the tube side heat transfer co-efficient just at theentrance of the tube is
a. Infinity
b. Zero
c. Same as average heat transfer co-efficient for tube side
d. None of these
Q. At Pr > 1, conduction in an ordinary fluid flowing through a heated pipe is limited to the
a. Buffer zone
b. Turbulent core
c. Both (A) and (B)
d. Viscous sub-layer
Q. Which of the following is the most controlling factor for the rate of bubble detachmentfrom the hot solid surface?
a. Liquid density
b. Liquid viscosity
c. Hot surface temperature
d. Interfacial tension
Q. 'Fouling factor' used in the design of a multipass shell and tube heat exchanger is awww.objectivebooks.com
a. Non-dimensional factor
b. Factor of safety
c. Conversion factor for individual film heat transfer co-efficient to overall heat transfer coefficient
d. None of these
Q. Radiation heat transfer rates does not depend upon the
a. Type of absorbing surface
b. Distance between the heat source and the object receiving the heat
c. Surface area and temperature of the heat source
d. None of these
Q. Economy of an evaporator is influenced by the
a. Steam pressure
b. Feed temperature
c. Number of effect
d. Both (B) & (C)
Q. Circulation pump is located below the evaporator to
a. Avoid cavitation
b. Avoid frequent priming
c. Create more suction head
d. None of these
Q. Which of the following is not concerned with the heat transfer?
a. Brinkman number
b. Stanton number
c. Schmidt number
d. Peclet number
Q. __________ equation relates the thermal conductivity of a solid to its temperature.
a. Antoine
b. Kopp's
c. Lee's
d. Kistyakowsky