Compressors
Compressors
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Question 1 |
What is the purpose of the compressor?
A | It takes low pressure liquid and changes it into high pressure liquid |
B | It takes a high pressure gas and changes it into a high pressure liquid |
C | It takes a low pressure gas and changes it into a high pressure gas |
D | It takes a low pressure liquid and changes it into a high pressure gas |
Question 2 |
A crankcase heater is used on a compressor to?
A | Thin the oil for increased lubrication |
B | Evaporate liquid refrigerant out of the compressor oil |
C | Warm the oil for increased lubrication of moving compressor components |
D | Keep snow from building up on the compressor during the winter months |
Question 3 |
What are the two most common types of compressors used in residential and light commercial air conditioning systems?
A | Reciprocating and rotary |
B | Rotary and scroll |
C | Centrifugal and reciprocating |
D | Reciprocating and scroll |
Question 4 |
Which of the following is considered a non positive displacement compressor?
A | Reciprocating |
B | Rotary |
C | Screw |
D | Centrifugal |
Question 5 |
Which type of compressor is completely sealed and must be replaced if it has internal damage?
A | Semi hermetic |
B | Hermetic |
C | Open type |
D | Centrifugal type |
Question 6 |
Name two types of compressor lubrication systems.
A | Forced and gravity feed lubrication |
B | Forced and splash lubrication |
C | Gravity feed and splash lubrication |
D | Plate and gravity feed lubrication |
Question 7 |
How are compressors cooled in residential and light commercial air conditioning systems?
A | Air motion and water |
B | Refrigerant and water |
C | Refrigerant and air |
D | Refrigerant and oil |
Question 8 |
What are the two types of compressor drives?
A | Belt and pulley |
B | Direct and belt |
C | Direct and indirect |
D | Indirect and pulley |
Question 9 |
Which compressor is not internally driven by a motor?
A | Hermetic |
B | Semi-hermetic |
C | Open type |
D | Closed type |
Question 10 |
Which compressor can handle some liquid refrigerant floodback?
A | reciprocating hermetic type |
B | reciprocating semi-hermetic type |
C | scroll type |
D | rotary type |
Question 11 |
How is the compressor compression ratio determined?
A | Discharge psia/suction psia |
B | Suction psia/discharge psia |
C | Discharge pisg/suction psig |
D | Suction psig/discharge psig |
Question 12 |
What is commonly used with a two speed compressor?
A | A tachometer |
B | A double riser |
C | A two stage thermostat |
D | A dual pressure relief valve |
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