Top 1000+ Solved Heat Transfer (HT) MCQ Questions Answer
Q. In case of solids, the heat transfer takes place according to
a. radiation
b. conduction
c. convection
d. Both (A) and (C)
e. Nichrome
Q. The heat of sum reaches to us according to
a. radiation
b. conduction
c. convection
d. None of the above
e. Nichrome
Q. A prototype is
a. a dynamically similar model on reduced scale
b. a kinematically similar model on reduced scale
c. 37,500 kg
d. a geometrical similar model on reduced scale
e. a full size structure employed in actual engineering design
Q. The equation E = ? AT4 represents
a. Wein's Law
b. Kirchhoff's law
c. Stefan Boltzmann's law
d. None of the above
e. Nichrome
Q. Two pieces of wood are placed in sunlight. One is painted white and the other is painted black. It can be concluded that
a. White painted wood will not absorb any solar radiation
b. Black painted wood will not absorb any solar radiation
c. Black painted wood will absorb less heat as compared to white painted wood
d. 37,500 kg
e. Black painted wood will absorb more hcat as compared to white painted wood
Q. A dimensionless group which represents the rate of the (product of intertial forces times buoyant forces) to viscous force squared is known as
a. Reynolds number
b. Mach number
c. Prandtl number
d. Grashof number
e. Nusselt number
Q. The ratio of heat transfer coefficient to the flow of heat per unit temperature rise due to the velocity of the fluid is known as
a. Stanton number
b. Weber number
c. Prandtl number
d. 37,500 kg
e. Grashoff number
Q. Which evaporator is preferred for concentrating the fruit juice?
a. Agitated film evaporator
b. Falling film evaporator
c. Long vertical tube evaporator
d. Zig-zag film evaporator
e. Short vertical tube evaporator
Q. A perfect black body is the one which
a. Absorbs all incident radiation
b. Reflects all incident radiation
c. Absorbs most of the incident radiation
d. Is coated with lamp black
e. None of the above
Q. Three rods one made of glass, one of pure aluminium and one made of wrought iron are heated to 150?C. All the rods are 15 mm in diameter and 300 mm long. The lowest temperature at the free end of the rods will occur in case of
a. Glass rod
b. Wrought iron rod
c. Temperature will depend on the surrounding air temperature
d. Aluminium rod
e. Temperature will be same for all the three rods at free end
Q. Non-dimensional number generally involved in case of heat transfer from horizontal cylinder by natural convection is
a. Reynolds number
b. Nusselt number
c. Prandtl number
d. Grashof's numbr
e. (B), (C) and (D) above
Q. Body A is kept in contact with body B. Heat will flow from A to B, if
a. The heat content of A is greater than that of B
b. The temperature of A is greter than that of B
c. The specific heat of A is greater than that of B
d. The specific heat of A is lower than that of B
e. None of the above
Q. Thermal conductivity of air at room temperature is approximately
a. 0.02 kcal/m-hr-?C
b. 0.002 kcal/m-hr-?C
c. 20.0 kcal/m-hr-?C
d. 0.2 kcal/m-hr-?C
e. 2.0 kcal/m-hr-?C
Q. What energy transformation takes place when ice is converted into water
a. Heat energy to kinetic energy
b. Kinetic energy to heat energy
c. Heat energy to latent heat
d. Heat energy to potential energy
e. None of the above