When α is absorptivity, ρ is reflectivity and τ is transmittivity, then for a diathermanous body,
Which of the following statement is wrong?
The coefficient of performance of a domestic refrigerator is __________ as compared to a domestic air-conditioner.
The refrigerant used for absorption refrigerators working on heat from solar collectors is a mixture of water and
Thermal conductivity of solid metals __________ with rise in temperature.
In a shell and tube heat exchanger, baffles are provided on the shell side to
During sensible cooling of air, specific humidity
The coefficient of performance of vapour compression refrigeration system is quite __________ as compared to air refrigeration system.
The undesireable property of a refrigerant is
The coefficient of performance (C.O.P.) is the reciprocal of the efficiency of a heat engine.
When there is an addition of water vapour to the air of enclosed space, a gain in __________ is said to occur.
During humidification process, dry bulb temperature
The process of heat transfer from one particle of the body to another is called conduction, when the particles of the body
In a black body, all radiations are rejected.
The horizontal and non-uniformly spaced lines on a psychrometric chart indicates
The average value of thermal conductivity for water atC saturate is about 0.51.
The transfer of heat by molecular collision is known as
In order to collect liquid refrigerant and to prevent it from going to a __________ , a device known as accumulator is used at the suction of compressor.
Stefan-Boltzmann law is applicable for heat transfer by convection.
Oil separator in a refrigeration cycle is installed
The dry bulb temperature during sensible heating of air
The wet bulb temperature atrelative humidity is __________ dry bulb temperature.
Wein's law states that the wave length corresponding to __________ is proportional to the absolute temperature.
The dehumidification process, on the psychrometric chart, is shown by
The relative humidity __________ as air gets drier.
Fourier's law of heat conduction gives the heat flow for
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