Which refrigeration system is driven by low-grade energy?

Which of the following is the working fluid in an air-cycle refrigeration system?

Lithium bromide is used as an absorbent in ________.

One ton of refrigeration is equal to ________ kW.

A thermoelectric refrigeration system requires :

In the context of aircraft refrigeration cycle, what is temperature of air at the exit of cooling turbine in the absence of moisture condensation?

The refrigerant used in the VCR based refrigerant cycle rejects heat in ________.

Where is air cycle refrigeration commonly used?

For a refrigerating machine, capacity is expressed as ________.

A capillary tube is employed in a refrigeration cycle to

The flash chamber in the single stage VCR cycle serves to ________.

What was the first refrigerant used in continuous refrigeration system?

Within a refrigeration system, the expansion valve is incorporated between the ________.

Which of the following is NOT a part of refrigeration system?

The gas refrigeration cycle is preferred in aircraft refrigeration because of:

The enthalpies at the beginning of compression, at the end of compression and at end of condensation are 180 kJ/kg, 200 kJ/kg and 90 kJ/kg respectively. Determine COP of the vapour compression refrigeration system.

The function of a capillary tube in the refrigeration cycle is to :

In a refrigeration system, why is receiver installed in the liquid line?

If the bypass factor is 0.30, what will be the efficiency of cooling coil or the contact factor?

The by-pass factor of a single cooling coil in an air-conditioner is 0.8. What will be the by-pass factor if three such cooling coils, with the same apparatus dew point, are kept one behind the other?

In a refrigeration system, why are expansion devices located closer to the evaporator?

Above critical pressure ratio, addition of regenerator in Brayton cycle causes one of the following:

Sub-cooling in a vapour compression refrigeration system ________enthalpy of liquid refrigerant below saturation level.

In a refrigeration plant removal of air to maintain pressure is termed as :

The numerical designation of air as refrigerant is :

Refrigerant-22 has chemical formula :

In Bell-Coleman cycle, the refrigeration effect happens at constant :

In the ammonia-water vapour absorption refrigeration cycle, the refrigerant used is :

The commonly used refrigerant in domestic refrigerators is :

Which of the following is a component of the vapour compression refrigeration cycle?

Which of the following is NOT a type of water-cooled condenser related to refrigeration plant?

A domestic refrigerator works on the

The chemical formula of R717 is

Commercial ice plants work on _______.

The air refrigeration system works on the ________.

An undesirable property of a refrigerant is its:

The coefficient of performance of the Bell-Coleman air refrigeration cycle in terms of the pressure ratio r_p is given by:

Which of the following devices is present in the vapour absorption refrigeration system and absent in the vapour compression refrigeration system?

A mixture of refrigerants having a fixed boiling point is called:

Electrolux system of refrigerant has:

A water heating heat pump abstracting 10 kW of heat from the atmosphere requires 2 kW of power input. The COP of the pump is :

Which of the following devices controls the refrigerant flow in a refrigeration system as per the heat load on the evaporator?

Modified polyester is a suitable lubricant in a refrigeration system with the refrigerant:

The compression of vapour is carried out by an ejector in which of the following refrigeration systems?

Pure refrigerant vapour is obtained for the condenser in a vapour absorption cooling system:

Identify the incorrect statement, from the following options:

Conventionally, in a domestic refrigerator, the coils/tubes at its back

An ideal refrigerator maintains a temperature of -23°cwhen placed inside a room at 27°C . Heat infiltration into the refrigerator is 0.5 kJ/s. The power required to pump the heat out is:

The relationship between the coefficient of performance (COP) of a heat pump and the coefficient of performance (COP) of a refrigerator is given by:

In a refrigeration plant, in a direct expansion evaporator :

The specific enthalpies of a refrigerant in a vapour compression refrigeration cycle are  Entrance of evaporator = 100 kJ/kg, exit of evaporator = 1200 kJ/kg, entrance of condenser = 1300 kJ/kg. Its coefficient of performance (COP) is :