Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

66) Conduction is a process of heat transfer

Answer is:

from one particle of the body to another without the actual motion of the particles

67) Thermal diffusivity of a substance is

Answer is:

all of the above

Explanation:

Thermal diffusivity of a substance is
* directly proportional to the thermal conductivity
* inversely proportional to density of substance
* inversely proportional to specific heat

68) Fouling factor is used

Answer is:

in heat exchanger design as a safety factor

69) The natural convection air cooled condensers are used in

Answer is:

domestic refrigerators

70) The process, generally used in winter air-conditioning to warm and humidity the air, is called

Answer is:

66) Conduction is a process of heat transfer

from one particle of the body to another without the actual motion of the particles

67) Thermal diffusivity of a substance is

all of the above

68) Fouling factor is used

in heat exchanger design as a safety factor

69) The natural convection air cooled condensers are used in

domestic refrigerators

70) The process, generally used in winter air-conditioning to warm and humidity the air, is called

heating and humidification