Reta Test 1 Questions with Verified Answers Graded A+
1. what does temperature indicate: intensity of heat energy in an object
2. what is required to move heat from one object to another:
temperature difference
3. which of these is required to obtain a valid reading from a pressure
temper- ature chart: the refrigerant must be in a saturated condition
4. which of these is an essential component of a mechanical
refrigeration system: expansion device
5. what is a function of a compressor in a mechanical refrigeration
system: to accept vapor from the evaporator and compress it to increase its
pressure and temperature
6. which of these accurately describes subcooled liquid: liquid cooled
below at saturation pressure
7. what does the term compression ratio refer to: the ratio of discharge
pressure to suction pressure in PSIA
8. which refrigerant is more forgiving to moisture in the refrigeration system
: R-717
9. which of these is most likely to occur when air leaks into a
refrigeration system: 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: rupture of the line if the
liquid warms
11. under what conditions do halocarbon refrigerants become most
haz- ardous: when did we come in contact with an open flame
12. which of these conditions is indicated in an ammonia condenser
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, Reta Test 1 Questions with Verified Answers Graded A+
operating with 180 PSIG pressure at the drain outlet and 90 degrees
Fahrenheit liquid temperature leaving the condenser: non condensables in
the condenser
13. What Will Liquid refrigerant trap in a pipe do when heated: expand
14. which industrial compressor would be direct drive at 3600 RPM:
screw compressor
15. why is the discharge temperature of a screw compressor lower than
the discharge temperature of a reciprocating compressor: significant
quantities of oil flow into the rotor section of a screw compressor
16. how does the intercooler help the low stage compressor and high
stage compressor: by d superheating low stage compressor discharge
temperature
17. which of these is the primary responsibility of a refrigeration
system operator: to track system operations in logs and maintenance
records
18. which of these functions are required by the operator to complete
logs properly: Monitor and record system temperatures, pressures levels and
product temperatures.
19. which of these should be done first when a reciprocating
compressor starts to pound or makes an unusual loud noise.: turn off
the compressor.
20. which of these most accurately describes when hydraulic pounding in
a reciprocating compressor is taking place.: when liquid refrigerant enters the
compression chamber.
21. which statement most accurately describes characteristics of a
2/5
1. what does temperature indicate: intensity of heat energy in an object
2. what is required to move heat from one object to another:
temperature difference
3. which of these is required to obtain a valid reading from a pressure
temper- ature chart: the refrigerant must be in a saturated condition
4. which of these is an essential component of a mechanical
refrigeration system: expansion device
5. what is a function of a compressor in a mechanical refrigeration
system: to accept vapor from the evaporator and compress it to increase its
pressure and temperature
6. which of these accurately describes subcooled liquid: liquid cooled
below at saturation pressure
7. what does the term compression ratio refer to: the ratio of discharge
pressure to suction pressure in PSIA
8. which refrigerant is more forgiving to moisture in the refrigeration system
: R-717
9. which of these is most likely to occur when air leaks into a
refrigeration system: 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: rupture of the line if the
liquid warms
11. under what conditions do halocarbon refrigerants become most
haz- ardous: when did we come in contact with an open flame
12. which of these conditions is indicated in an ammonia condenser
1/5
, Reta Test 1 Questions with Verified Answers Graded A+
operating with 180 PSIG pressure at the drain outlet and 90 degrees
Fahrenheit liquid temperature leaving the condenser: non condensables in
the condenser
13. What Will Liquid refrigerant trap in a pipe do when heated: expand
14. which industrial compressor would be direct drive at 3600 RPM:
screw compressor
15. why is the discharge temperature of a screw compressor lower than
the discharge temperature of a reciprocating compressor: significant
quantities of oil flow into the rotor section of a screw compressor
16. how does the intercooler help the low stage compressor and high
stage compressor: by d superheating low stage compressor discharge
temperature
17. which of these is the primary responsibility of a refrigeration
system operator: to track system operations in logs and maintenance
records
18. which of these functions are required by the operator to complete
logs properly: Monitor and record system temperatures, pressures levels and
product temperatures.
19. which of these should be done first when a reciprocating
compressor starts to pound or makes an unusual loud noise.: turn off
the compressor.
20. which of these most accurately describes when hydraulic pounding in
a reciprocating compressor is taking place.: when liquid refrigerant enters the
compression chamber.
21. which statement most accurately describes characteristics of a
2/5
