Related Questions

The variable required to be known in correlations used for estimating the horse power of a centrifugal gas compressor and hence its cost are P. Inlet pressure Q. Compressor rpm R. Delivery pressure S. Volumetric flow rate at inlet.
A P, Q and R
B P and R
C R and S
D P, R and S
In an axial flow compressor, the ratio of pressure in the rotor blades to the pressure rise in the compressor in one stage is known as
A Work factor
B Slip factor
C Degree of reaction
D Pressure coefficient
The pressure at the outlet of a refrigerant compressor is called
A Suction pressure
B Discharge pressure
C Critical pressure
D Back pressure
A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be
A Lack of cooling water
B Water temperature being high
C Dirty condenser surface
D All of these
For very low pressure and high discharge rate, the compressor used is a/an __________ compressor.
A Axial
B Reciprocating
C Rotary
D None of these
The refrigerant supplied to a compressor must be
A Superheated vapour refrigerant
B Dry saturated liquid refrigerant
C A mixture of liquid and vapour refrigerant
D None of these
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.
A Compressor
B Condenser
C Expansion valve
D Evaporator
The condition of refrigerant as it leaves the compressor in a vapour compression system is
A Saturated liquid
B Wet vapour
C Dry saturated vapour
D Superheated vapour
A refrigerant compressor is used to
A Raise the pressure of the refrigerant
B Raise the temperature of the refrigerant
C Circulate the refrigerant through the refrigerating system
D All of the above
Which of the following is a widely used refrigerant in vapour compression refrigeration system (using large centrifugal compressor)?
A Freon
B Liquid sulphur dioxide
C Methyl chloride
D Ammonia

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