Top 50+ Solved Heat Transfer MCQ Questions Answer
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
Q. Heat transfer takes place as per -
a. zeroth law of thermodynamics
b. first law of thermodynamic
c. second law of the thermodynamics
d. Kirchhoff law (e) Stefan's law.
Q. When heat is transferred from one particle of hot body to another by actual motion of the heated particles, it is referred toas heat transfer by
a. conduction
b. convection
c. radiation
d. conduction and convection
Q. When heat is transferred from hot body to cold body, in a straight line, without affecting the intervening medium, it isreferred as heat transfer by
a. conduction
b. convection
c. radiation
d. conduction and convection
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
Q. When heat is Transferred by molecular collision, it is referred to as heat transfer by
a. conduction
b. convection
c. radiation
d. convection and radiation.
Q. Heat transfer in liquid and gases takes place by
a. conduction
b. convection
c. radiation
d. conduction and convection
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. all of the above.
Q. Metals are good conductors of heat because
a. their atoms collide frequently
b. thier atoms-are relatively far apart
c. they contain free electrons
d. they have high density
Q. Thermal conductivity of air with rise in temperature
a. increases
b. decreases
c. remains constant
d. may increase or decrease depending on temperature
Q. Heat flows from one body to other when they have
a. different heat contents
b. different specific heat
c. different atomic structure
d. different temperatures
Q. The concept of overall coefficient of heat transfer is used in heat transfer problems of
a. conduction
b. convection
c. radiation
d. conduction and convection.
Q. In heat transfer, conductance equals conductivity (kcal/hr/sqm/°C/cm) divided by
a. hr (time)
b. sqm (area)
c. °C (temperature)
d. cm (thickness)