Compressor Objective 3

What are the five main types of compressors categorized according to construction?

• Single, Double, Triple, Quadruple, Quintuple

• Piston, Diaphragm, Axial, Vane, Gear

• Screw, Scroll, Rotary, Reciprocating, Centrifugal

• Positive, Negative, Zero, Fractional, Rational

Which type of compressor uses one or two interlocking rotors that resemble screws or gears to compress refrigerant vapour?

• Scroll Compressor

• Centrifugal Compressor

• Rotary Compressor

• Screw Compressor

What is the primary difference between the twin screw and single screw compressors?

• Number of rotors

• Type of refrigerant used

• Operating temperature range

• Capacity control mechanism

What is the function of the discharge check valve in a scroll compressor?

• Controls capacity

• Monitors temperature

• Regulates oil flow

• Prevents reverse flow of refrigerant

Which type of compressor uses a rotor and vanes to compress refrigerant vapour?

• Centrifugal Compressor

• Reciprocating Compressor

• Rotary Compressor

• Screw Compressor

What is the purpose of the oil pump in a rotary compressor?

• Maintain positive oil pressure

• Control capacity

• Regulate temperature

• Prevent leakage

How does a reciprocating compressor compress refrigerant vapour?

• Using a piston and cylinder assembly

• Using a rotor and vanes

• Using fixed and orbiting scrolls

• Using a discharge volute

What differentiates an open drive reciprocating compressor from hermetic and semi-hermetic compressors?

• Type of refrigerant used

• Number of cylinders

• Drive motor location

• Enclosure design

What is the function of the volute in a centrifugal compressor?

• Control capacity

• Prevent leakage

• Maintain oil pressure

• Convert velocity pressure to static pressure

Which type of compressor uses a refrigerant-cooled direct drive motor?

• Rotary Compressor

• Scroll Compressor

• Centrifugal Compressor

• Reciprocating Compressor