Refrigeration and Air Conditioning
The reciprocating refrigerant compressors are very suitable for

Small displacements and low condensing pressures
Large displacements and low condensing pressures
Large displacements and high condensing pressures
Small displacements and high condensing pressures

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Refrigeration and Air Conditioning
In a vapour compression refrigeration system, a throttle valve is used in place of an expander because

The positive work in isentropic expansion of liquid is very small
It considerably reduces mass of the system
It leads to significant cost reduction
It improves the C.O.P., as the condenser is small

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Refrigeration and Air Conditioning
Which of the following statement is correct?

The wet bulb and dry bulb temperature are equal at saturation condition
The constant enthalpy lines are also constant wet bulb temperature lines
The wet bulb temperature is a measure of enthalpy of moist air
All of the listed here

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