Top 1000+ Solved Heat Transfer (HT) MCQ Questions Answer
Q. A vapour containing liquid particles to the extent of 50% by the volume is known as
a. Saturate vapour
b. Superheated vapour
c. Super saturated liwuid
d. Wet vapour
e. Saturated liquid
Q. Ice is slippery when a man walks on it for
a. There is no friction
b. Increase of pressure causes it to melt
c. It is very chill
d. Its surface is smooth
e. It has lubricating qualities
Q. The total solar radiation incident on a body is 1000 kcal/min. The body reflects 400 kcal/min. If the transmissivity of the surface will be
a. 0.85
b. 0.3
c. 0.45
d. 0.15
e. 0.4
Q. The nature of flow of a fluid inside a tube i.e., whether it is turbulent or laminar, is ascertained by
a. Viscosity of fluid
b. Flow velocity
c. Surface conditions
d. Tube size
e. Reynolds number
Q. When metallic surfaces are oxidized the emissivity
a. Depends on the temperature
b. Depends on other factors
c. Decreases
d. Does not change
e. Increases
Q. For which fluid combination the value of overall heat transfer coefficient will be least?
a. Alcohol condensers
b. Air to heavy tars
c. Feed water heaters
d. 37,500 kg
e. Air condensers
Q. The rate of heat flow between a solid wall and a fluid (in contact with a solid wall) is given by
a. Wein's Law
b. Kirchhoff's law
c. Newton-Rikhman's Law
d. None of the above
e. Nichrome
Q. Radio active nuclear waste is treated in
a. Pulsed column extractor
b. Mixer settler extractor
c. Sieve plate extraction column
d. Bollman extractor
e. None of the above
Q. In which case does the thermal conductivity increase from left to right?
a. Aluminium, silver, copper
b. 37,500 kg
c. Aluminium, copper, silver
d. Silver, copper, aluminium
e. Copper, silver, aluminium
Q. If two systems are being compared on the basis of temperature and heat flux, the similarity being considered is
a. 37,500 kg
b. thermal similarity
c. dynamic similarity
d. geometrical similarity
e. kinematic similarity
Q. Thermal conductivity of air at room temperature in kcal/m-hr-?C is nearly
a. 0.1
b. 0.001
c. 0.005
d. 0.05
e. 0.01
Q. Steam traps are used to
a. Heat steam
b. Remove condensate
c. Balance the pressure
d. Regulate the flow
e. Add moisture
Q. The temperature inside a furnace is generally measured by
a. Mercury thermometer
b. Alcohol thermometer
c. Gas thermometer
d. Optical pyrometer
e. Any of the above
Q. At all wavelengths and temperatures the monochromatic emissivity of a white body is equal to
a. Zero
b. Unity
c. 0.1 to 0.5
d. 0.5
e. 0.5 to 1