RETA TEST 1| 45+ ACTUAL QUESTIONS &
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 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
1 V/
V4
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 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
1 V/
V4
