01.Which one of the following is correct relation between (COP)HP and (COP)R
(COP)HP – (COP)R = 1
02. Thermoelectric refrigeration system is based on
Peltier effect.
03.The COP of a Carnot refrigeration cycle decreases on
increasing the upper temperature and decreasing the lower temperature.
04.The coefficient of performance of a domestic refrigerator is __________ as compared to a domestic air-conditioner.
less.
05.In a domestic refrigerator, a capillary tube controls the flow of refrigerant from the
expansion valve to the evaporator.
06.Formation of frost on evaporator of refrigerator
loss of heat transfer rate due to poor heat transfer.
07.In a vapour compression cycle, the refrigerant immediately after expansion valve is
Wet vapour.
08.Sub-cooling in a refrigeration cycle have effect of
increase in COP.
09.Superheating in refrigeration cycle
decreases COP.
10.Solid CO2 is produced by
pressure snow chamber method.
11.The thermodynamic cycle used in aircraft refrigeration is
reversed Brayton.
12.Bell Coleman cycle consists of
two isobars and two isentropes.
13.In electrolux refrigerator.
ammonia evaporates in hydrogen .
14.Which of the following cycles uses air as the refrigerant
Bell-coleman.
15.An important characteristic of absorption system of refrigeration is
quiet operation.
16.The relative coefficient of performance is
actual COP/theoretical COP.
(COP)HP – (COP)R = 1
02. Thermoelectric refrigeration system is based on
Peltier effect.
03.The COP of a Carnot refrigeration cycle decreases on
increasing the upper temperature and decreasing the lower temperature.
04.The coefficient of performance of a domestic refrigerator is __________ as compared to a domestic air-conditioner.
less.
05.In a domestic refrigerator, a capillary tube controls the flow of refrigerant from the
expansion valve to the evaporator.
06.Formation of frost on evaporator of refrigerator
loss of heat transfer rate due to poor heat transfer.
07.In a vapour compression cycle, the refrigerant immediately after expansion valve is
Wet vapour.
08.Sub-cooling in a refrigeration cycle have effect of
increase in COP.
09.Superheating in refrigeration cycle
decreases COP.
10.Solid CO2 is produced by
pressure snow chamber method.
11.The thermodynamic cycle used in aircraft refrigeration is
reversed Brayton.
12.Bell Coleman cycle consists of
two isobars and two isentropes.
13.In electrolux refrigerator.
ammonia evaporates in hydrogen .
14.Which of the following cycles uses air as the refrigerant
Bell-coleman.
15.An important characteristic of absorption system of refrigeration is
quiet operation.
16.The relative coefficient of performance is
actual COP/theoretical COP.
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