Q.1
The C.O.P. of an absorption type refrigerator is given by (where T₁ = Temperature at which the working substance receives heat, T₂ = Temperature of cooling water, and T₃ = Evaporator temperature)
Q.2
Critical temperature is the temperature above which
Q.3
In vapour compression refrigeration system, refrigerant occurs as liquid between
Q.4
The total pressure exerted by the mixture of air and water vapour is equal to the sum of pressures which each constituent would exert, if it occupied the same space by itself. This statement is called
Q.5
Which of the following statement is wrong?
Q.6
Which of the following statement is wrong?
Q.7
In S.J. unit, one ton of refrigeration is equal to
Q.8
Air conditioning means
Q.9
In a psychrometric chart, specific humidity (moisture content) lines are
Q.10
The reduced ambient air cooling system has
Q.11
A bootstrap air cooling system has
Q.12
The bypass factor for a cooling coil
Q.13
One ton refrigeration corresponds to
Q.14
Ammonia absorption refrigeration cycle requires
Q.15
The leakage in a refrigeration system using Freon is detected by
Q.16
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.
Q.17
The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases,
Q.18
In Electrolux refrigerator
Q.19
The dry bulb temperature lines, on the psychrometric chart are
Q.20
The relative humidity lines on a psychrometric chart are
Q.21
The refrigerant supplied to a compressor must be
Q.22
One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice
Q.23
Which of the following is not a desirable property of a refrigerant?
Q.24
The relative coefficient of performance is
Q.25
The wet bulb temperature at 100% relative humidity is ________ dew point temperature.
Q.26
Bell Coleman cycle is a
Q.27
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
Q.28
In larger industrial and commercial reciprocating compression systems, refrigerant widely used is
Q.29
Degree of saturation or percentage humidity is
Q.30
The superheated vapour region, in a pressure enthalpy chart, is represented by the space
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