Top 1000+ Solved Heat Transfer (HT) MCQ Questions Answer
Q. The process of removal of oil from oil cakes is known as
a. Leaching
b. Decoction
c. Osmosis
d. Soret effect
e. None of the above
Q. A thermistor is a
a. Miniature resistance
b. Thermo-couple
c. Thermometer
d. Thermal insulation
e. Thermal resistance
Q. In the electrical network analysis method the total radiation which leaves a surface per unit time per unit area is termed as
a. Flux
b. Potential
c. Irradiation
d. Spatial resistance
e. Radiosity
Q. If in a system ratios of the velocity and acceleration of the homologous particles are equal, the similarity being considered is
a. geometric similarity
b. kinematic similarity
c. dynamic similarity
d. thermal similarity
e. 37,500 kg
Q. A wet solid is to be dried from 80% to 50% moisture (on wet basis). Calculate the moisture to be evaporated for 10 tonns of dried product?
a. 3750 kg
b. 37,500 kg
c. 375 kg
d. 7500 kg
e. 13,750 kg
Q. Grashoff number has significant role in heat transfer by
a. 37,500 kg
b. radiation
c. natural connection
d. conduction
e. Forced convection
Q. Least value of Prandlt number can be expected in case of
a. Salt solution
b. Water
c. Sugar solution
d. Petroleum products
e. Liquid metals
Q. Heat conduction does not occur
a. If the parts of a body are not in motion relative to one another
b. If the bodies are immersed in water
c. If the temperature difference between the bodies does not exist
d. If a physical body is impermeable to any kind of rays
e. If the bodies are kept in vacuum
Q. The numerical value of which property of air generally drops with rising temperature
a. Thermal diffusivity
b. Density
c. Kinematic viscosity
d. Thermal conductivity
e. Dynamic viscosity
Q. For all substances the absorptivity must lie between
a. 0 and + 0.5
b. ?1 and +1
c. ?0.5 and + 0.5
d. 0 and 0.1
e. 0 and 1
Q. A black body absorbs all radiations. As a result of absorption of these radiations
a. A black body shines
b. The temperature of black body rises
c. Black body radiates energy to other bodies
d. Black body becomes good conductor of heat
e. None of the above
Q. A block of wood and a block of metal feel equally cold or equally hot when touched. Then their common temperature is
a. 0?K
b. 0?F
c. 0?C
d. 37,500 kg
e. the same as that of the human body
Q. The expression (A2-A1)/loge (A2/A1) for a hollow cylinder is known as
a. Logarithmic mean radius
b. Mean area of heat transfer
c. The rate of heat transfer
d. None of the above
e. Nichrome