RETA TEST 1
1. what does temperature indicate
Answer intensity of heat energy in an object
2. what is required to move heat from one object to another
Answer temperature ditterence
3. which of these is required to obtain a valid reading from a pressure temper-
ature chart
Answer the refrigerant must be in a saturated condition
4. which of these is an essential component of a mechanical refrigeration sys-
tem
Answer expansion device
5. what is a function of a compressor in a mechanical refrigeration system
Answer to accept vapor from the evaporator and compress it to increase its pressure and temperature
6. which of these accurately describes subcooled liquid
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10
, Answer liquid cooled below at saturation pressure
7. what does the term compression ratio refer to
Answer the ratio of discharge pressure to suction pressure in PSIA
8. which refrigerant is more forgiving to moisture in the refrigeration system
Answer -
R-717
9. which of these is most likely to occur when air leaks into a refrigeration
system
Answer an increase in compressor discharge pressure
10. which of these is the greatest risk from closing valves on each end of a
liquid line between a liquid pump and an evaporator during maintenance of
an ammonia refrigeration system
Answer rupture of the line if the liquid warms
11. under what conditions do halocarbon refrigerants become most hazardous-
2/
10
1. what does temperature indicate
Answer intensity of heat energy in an object
2. what is required to move heat from one object to another
Answer temperature ditterence
3. which of these is required to obtain a valid reading from a pressure temper-
ature chart
Answer the refrigerant must be in a saturated condition
4. which of these is an essential component of a mechanical refrigeration sys-
tem
Answer expansion device
5. what is a function of a compressor in a mechanical refrigeration system
Answer to accept vapor from the evaporator and compress it to increase its pressure and temperature
6. which of these accurately describes subcooled liquid
1/
10
, Answer liquid cooled below at saturation pressure
7. what does the term compression ratio refer to
Answer the ratio of discharge pressure to suction pressure in PSIA
8. which refrigerant is more forgiving to moisture in the refrigeration system
Answer -
R-717
9. which of these is most likely to occur when air leaks into a refrigeration
system
Answer an increase in compressor discharge pressure
10. which of these is the greatest risk from closing valves on each end of a
liquid line between a liquid pump and an evaporator during maintenance of
an ammonia refrigeration system
Answer rupture of the line if the liquid warms
11. under what conditions do halocarbon refrigerants become most hazardous-
2/
10
