Top 1000+ Solved Heat Transfer (HT) MCQ Questions Answer
Q. Unit of thermal conductivity in M.K.S. units is
a. kcal/kg m2 °C
b. kcal-m/hr m2 °C
c. kcal/hr m2 °C
d. kcal-m/hr °C
e. kcal-m/m2 °C.
Q. Unit of thermal conductivity in S.I. units is
a. J/m2 sec
b. J/m °K sec
c. W/m °K
d. a) and c) above
e. b) and c) abov
Q. Thermal conductivity of solid metals with rise in temperature normally
a. increases
b. decreases
c. remains constant
d. may increase or decrease depending on temperature
e. unpredictabl
Q. Thermal conductivity of non-metallic amorphous solids with decrease intemperature
a. increases
b. decreases
c. remains constant
d. may increase or decrease depending on temperature
e. unpredictabl
Q. Heat transfer takes place as per –
a. zeroth law of thermodynamics
b. first law of thermodynamic
c. second law of the thermodynamics
d. Kirchoff’s law
e. Stefan’s law.
Q. When heat is transferred from one particle of hot body to another by actualmotion of the heated particles, it is referred to as heat transfer by
a. conduction
b. convection
c. radiation
d. conduction and convection
e. convection and radiation.
Q. When heat is transferred form hot body to cold body, in a straight line, withoutaffecting the intervening medium, it is referred as heat transfer by
a. conduction
b. convection
c. radiation
d. conduction and convection
e. convection and radiation.
Q. Sensible heat is the heat required to
a. change vapour into liquid
b. change liquid into vapour
c. increase the temperature of a liquid of vapour
d. convert water into steam and superheat it
e. convert saturated steam into dry steam.
Q. The insulation ability of an insulator with the presence of moisture would
a. increase
b. decrease
c. remain unaffected
d. may increase/decrease depending on temperature and thickness of insulation
e. none of the abov
Q. When heat is Transferred by molecular collision, it is referred to as heattransfer by
a. conduction
b. convection
c. radiation
d. scattering
e. convection and radiation.
Q. Heat transfer in liquid and gases takes place by
a. conduction
b. convection
c. radiation
d. conduction and convection
e. convection and radiation.
Q. Which of the following is the case of heat transfer by radiation
a. blast furnace
b. heating of building
c. cooling of parts in furnace
d. heat received by a person from fireplace
e. all of the abov
Q. Pick up the wrong case. Heat flowing from one side to other depends directlyon
a. face area
b. time
c. thickness
d. temperature difference
e. thermal conductivity.
Q. Metals are good conductors of heat because
a. their atoms collide frequently
b. their atoms-are relatively far apart
c. they contain free electrons
d. they have high density
e. all of the abov