Refrigeration and Air Conditioning
The thermostatic expansion valve operates on the changes in the

Temperature of the evaporator
Pressure in the evaporator
Degree of superheat at exit from the evaporator
None of these

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP

Refrigeration and Air Conditioning
Environmental protection agencies advice against the use of chlorofluorocarbon refrigerants since

These react with water vapour and cause acid rain
These react with ozone layer
These react with plants and cause greenhouse effect
These react with oxygen and cause its depletion

ANSWER DOWNLOAD EXAMIANS APP