COMPRESSORS (R & AC)

Which of the following is a non positive displacement compressor?

• Rotary compressor
• Screw compressor
• Reciprocating compressor
• Centrifugal compressor

In centrifugal compressor what is the compressor of air conditioning system for chilling the water______

• 10° to 12°
• 6° to 8°
• 4° to 6°
• 8° to 10°

How many rotors are there in screw compressor?

• 3 rotors
• 2 rotors
• 4 rotors
• 5 rotors

Semi hermetic compressors capacity?

• 1.5 to 150 tons
• 1.3 to 160 tons
• 1.2 to 170 tons
• 1.1 to 180 tona

What is the purpose of using a refrigerant compressor?

• Raise the temperature of refrigerant
• Reduce the temperature of refrigerant
• Reduce the pressure of refrigerant
• Expand the refrigerant

What must be the state of refrigerant entering the compressor?

• Dry saturated vapour refrigerant
• Dry saturated liquid refrigerant
• Vapour and liquid mixture
• Superheated vapour refrigerant

What is the pressure at the outlet of a refrigerant compressor?

• Critical pressure
• Suction pressure
• Discharge pressure
• Backpressure

What is the pressure at the inlet of a refrigerant compressor?

• Critical pressure
• Suction pressure
• Discharge pressure
• Backpressure

Where is the reciprocating compressor mostly suitable?

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

What is the volume of the amount of refrigerant passing through compressor called?

• Compressor rating
• Compressor ratio
• Compressor capacity
• Compressor efficiency