In a refrigeration cycle the heat is rejected by refrigerant at
Correct!
Wrong!
The flow of the refrigerant in a refrigeration cycle is controlled by
Correct!
Wrong!
In a mechanical refrigeration system the highest temperature of refrigerant occurs
Correct!
Wrong!
The chemical formula for Freon-12 is
Correct!
Wrong!
A device designed to remove moisture from a refrigerant is called
Correct!
Wrong!
The leaks of refrigerant from a cycle may be detected by
Correct!
Wrong!
In a refrigeration system, if the compressor short cycles, the probable cause could be
Correct!
Wrong!
In case of freon as refrigerant the pipe lines should be of
Correct!
Wrong!
he heat removed capacity of a one ton refrigerator is
Correct!
Wrong!
Dry bulb temperature depends on
Correct!
Wrong!
A condenser removes from the refrigerant
Correct!
Wrong!
A critical temperature is the temperature
Correct!
Wrong!
Which type of compressor is commonly used in room air-conditioner
Correct!
Wrong!
A refrigerant cycle is usually a
Correct!
Wrong!
Which of the following is not a property of Carbondioxide?
Correct!
Wrong!
Reversed Carnot cycle assumes that all processes in the cycle are
Correct!
Wrong!
Sometimes refrigeration plants use cooling towers. The water cooled in those towers is supplied
Correct!
Wrong!
When moisture is removed from air at constant dry bulb temperature the process is known as
Correct!
Wrong!
The ratio of sensible heat to total heat is known as
Correct!
Wrong!
In cooling towers the heat is dissipated mainly by
Correct!
Wrong!
The relation between vapour pressure to the enthalpy of vaporisation is expressed in
Correct!
Wrong!
he difference between dry bulb temperature and wet bulb temperature, is called
Correct!
Wrong!
According to Dalton's law of partial pressures, (where pb = Barometric pressure, pa = Partial pressure of dry air, and pv = Partial pressure of water vapour)
Correct!
Wrong!
The automobile radiator is a heat exchanger of
Correct!
Wrong!
A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking 1 kW of work input. The refrigerating effect will be
Correct!
Wrong!
The freon group of refrigerants are
Correct!
Wrong!
In a heat exchanger with one fluid evaporating or condensing, the surface area required is least in
Correct!
Wrong!
Which of the following refrigerant has the maximum ozone depletion potential in the stratophere?
Correct!
Wrong!
A boot-strap air cooling system has
Correct!
Wrong!
If a gas is to be liquified, its temperature must be
Correct!
Wrong!
In case of liquids and gases, the heat transfer takes place according to
Correct!
Wrong!
he refrigerant supplied to a compressor must be
Correct!
Wrong!
The pressure at the outlet of a refrigerant compressor is called
Correct!
Wrong!
The evaporator used in house-hold refrigerators is
Correct!
Wrong!
The air cooling system mostly used in transport type aircrafts is
Correct!
Wrong!
The ratio of energy transferred by convection to that by conduction is called
Correct!
Wrong!
The value of the wave length for maximum emissive power is given by
Correct!
Wrong!
The heat of sun reaches to us according to
Correct!
Wrong!
The undesireable property of a refrigerant is
Correct!
Wrong!
The heat transfer from a hot body to a cold body is directly proportional to the surface area and difference of temperatures between the two bodies. This statement is called
Correct!
Wrong!
The lowest temperature during the cycle in a vapour compression system occurs after
Correct!
Wrong!