Refrigeration License Exam
Study online at https://quizlet.com/_f4sp8d
1. Mixed occupancy occurs when two or more occupan- True
cies are located within the same building?
2. A theatre is considered a commercial occupancy False
3. High or low probability systems refer to the probabil- True
ity that a leakage of refrigerant from a failed connec-
tion, seal or component in the system can enter the
occupied space
4. A2 refriegerants habve a higher toxicity than B2 False
5. A3 group refrigerants have a higher flammability rat- True
ing than b1
6. If the refrigerant is ammonia Can be used in all institu-
tions under certain condi-
tions
7. can an unlicensed person work on a refrigeration yes
System with a technician
8. What is the name for chlorodifluromethane r22
9. On a centrifugal compressor the high take out relief Ruptured disc
is a
10. condenser with the greatest capacity and efficiency Shell and tube
11. Suction oil trap should be provided when the con- Above the evaporator
densing unit is
12. in. REFRIGERATING MACHINERY ROOM THE emer- outside the main door
gency shutdown procedure shall be located
, Refrigeration License Exam
Study online at https://quizlet.com/_f4sp8d
13. a transformer consists of which parts primary, secondary, and
core
14. stop valves shall not be permitted between the sys- relief valve
tem and the
15. fusible plugs must be marked in temperature
16. pressure limiting device is high pressure control
17. the pressure limiting device shall be connected between the compressor
and stop valve on the dis-
charge side
18. what type of copper tubing is not permitted on a type m
refrigeration system
19. the thermometer is placed in the discharge air. this sensible heat
reading is
20. transformers are rated in volt amps
21. the equation for ohms law is volts= amps X Ohms
22. a single pole double double throw switch has how 3
many wires
23. boiling point of refrigerant is governed by pressure temperature rela-
tionship
24. when the compressor is below the condenser traps are needed on the
discharge line
25. what is the required mechanical code for ref and ac? ashrae 15
, Refrigeration License Exam
Study online at https://quizlet.com/_f4sp8d
26. what rate is used to raise one pound of water one btu
degree
27. heat associated with a change of state but not temp latent heat
28. inorganic refrigerant? R717 ammonia
29. Halogenated refrigerants are not compatible with magnesium
30. how is brine measured hydrometer
31. what is the heat called when substance changes state latent heat
32. positive disppacement compressors with a stop valve high pressure control
on the discharge line must have what before the stop
valve?
33. what is the suction accumulator? a device used to store ex-
cessive liquid in the suction
line
34. if the purge unit fails what are the symptoms high pressure
35. r22 and 410a operate in the same range of condens- True
ing and evaporating temperatures?
36. R410a can segregate in the system and change its false
state due to a leak?
37. booster compressor dischsrges into suction of the main com-
pressor
38. brazed joints melt at 1000 degrees
39. 78.6
Study online at https://quizlet.com/_f4sp8d
1. Mixed occupancy occurs when two or more occupan- True
cies are located within the same building?
2. A theatre is considered a commercial occupancy False
3. High or low probability systems refer to the probabil- True
ity that a leakage of refrigerant from a failed connec-
tion, seal or component in the system can enter the
occupied space
4. A2 refriegerants habve a higher toxicity than B2 False
5. A3 group refrigerants have a higher flammability rat- True
ing than b1
6. If the refrigerant is ammonia Can be used in all institu-
tions under certain condi-
tions
7. can an unlicensed person work on a refrigeration yes
System with a technician
8. What is the name for chlorodifluromethane r22
9. On a centrifugal compressor the high take out relief Ruptured disc
is a
10. condenser with the greatest capacity and efficiency Shell and tube
11. Suction oil trap should be provided when the con- Above the evaporator
densing unit is
12. in. REFRIGERATING MACHINERY ROOM THE emer- outside the main door
gency shutdown procedure shall be located
, Refrigeration License Exam
Study online at https://quizlet.com/_f4sp8d
13. a transformer consists of which parts primary, secondary, and
core
14. stop valves shall not be permitted between the sys- relief valve
tem and the
15. fusible plugs must be marked in temperature
16. pressure limiting device is high pressure control
17. the pressure limiting device shall be connected between the compressor
and stop valve on the dis-
charge side
18. what type of copper tubing is not permitted on a type m
refrigeration system
19. the thermometer is placed in the discharge air. this sensible heat
reading is
20. transformers are rated in volt amps
21. the equation for ohms law is volts= amps X Ohms
22. a single pole double double throw switch has how 3
many wires
23. boiling point of refrigerant is governed by pressure temperature rela-
tionship
24. when the compressor is below the condenser traps are needed on the
discharge line
25. what is the required mechanical code for ref and ac? ashrae 15
, Refrigeration License Exam
Study online at https://quizlet.com/_f4sp8d
26. what rate is used to raise one pound of water one btu
degree
27. heat associated with a change of state but not temp latent heat
28. inorganic refrigerant? R717 ammonia
29. Halogenated refrigerants are not compatible with magnesium
30. how is brine measured hydrometer
31. what is the heat called when substance changes state latent heat
32. positive disppacement compressors with a stop valve high pressure control
on the discharge line must have what before the stop
valve?
33. what is the suction accumulator? a device used to store ex-
cessive liquid in the suction
line
34. if the purge unit fails what are the symptoms high pressure
35. r22 and 410a operate in the same range of condens- True
ing and evaporating temperatures?
36. R410a can segregate in the system and change its false
state due to a leak?
37. booster compressor dischsrges into suction of the main com-
pressor
38. brazed joints melt at 1000 degrees
39. 78.6
