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NATE Air Conditioning Components

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. A secondary drain line...
208-volt/240-volt single-phase power supply
The power from the transformer
Precharged refrigeration linesets
Must be located in a conspicuous place to serve as an alarm

2. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
Must be coiled horizontally and the vapor must flow from top to bottom
The lines must be covered by PVC to prevent contact with the masonry material
The accumulator
Condenser

3. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The contactor coil
Compressor
Evaporator
This will prevent settling of the ground - which can cause refrigerant line damage

4. When installing a refrigeration line set through a masonry wall
Near a return-air grill
A compression fitting
The receiver
The lines must be covered by PVC to prevent contact with the masonry material

5. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Evaporator
Must be coiled horizontally and the vapor must flow from top to bottom
Condenser
To prevent condensation from forming

6. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Capillary action
The coil is precharged with nitrogen
Compressor
Metering device

7. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
The blower relay coil
Capillary action
A compression fitting
Metering device (restrictor)

8. Before energizing a newly installed system - what test should always be done...
Compressor
Check for tight connections at electrical terminals
The coil is precharged with nitrogen
The temperature increases

9. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
24 volts
Compressor
24 volts
Must be located in a conspicuous place to serve as an alarm

10. An auxiliary drain pan must...

11. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Insulated
Refrigerant must be added to the system
Evaporator
The heating control circuit

12. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Capillary action
Evaporator
Metering device (restrictor)
The receiver

13. Which part of the system stores refrigerant until it is needed in the evaporator...
Must be located in a conspicuous place to serve as an alarm
Have a minimum perimeter of 3' larger than the unit being served
The receiver
Metering device

14. A split-system air conditioning unit has...
The receiver
The cooling contactor coil
Must be located in a conspicuous place to serve as an alarm
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

15. Quick-connect fittings are commonly used on...
The heating control circuit
Condenser
The blower relay coil
Precharged refrigeration linesets

16. What is the 'are' terminal used for on the thermostat...
The temperature increases
The power from the transformer
The suction line must be pitched toward the condensing unit
The receiver

17. What is the 'G' terminal used for on the thermostat...
Refrigerant must be added to the system
208-volt/240-volt single-phase power supply
The blower relay coil
Condenser

18. When installing a refrigeration line set through a masonry wall
Condenser
Condenser
The heating control circuit
The lines must be covered by PVC to prevent contact with the masonry material

19. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
The suction line must be pitched toward the condensing unit
Condenser
Capillary action
Compressor

20. A room thermostat should be mounted...
A compression fitting
Condenser
Precharged refrigeration linesets
Near a return-air grill

21. In a sealed system - as the pressure increases...
Compressor
The heating control circuit
Compressor
The temperature increases

22. What must be done to the system when a condensing unit is precharged for 25' of refrigerant line and uses 32' of refrigerant line...
The temperature increases
Refrigerant must be added to the system
The power from the transformer
Precharged refrigeration linesets

23. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The power from the transformer
The coil is precharged with nitrogen
Metering device (restrictor)

24. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
A TXV
Compressor
A compression fitting
The receiver

25. Residential split-system outdoor condensing units are commonly wired with a...
Capillary action
The power from the transformer
Refrigerant must be added to the system
208-volt/240-volt single-phase power supply

26. Quick-connect fittings are commonly used on...
Precharged refrigeration linesets
Near a return-air grill
The receiver
Evaporator

27. What must be done to the system when a condensing unit is precharged for 25' of refrigerant line and uses 32' of refrigerant line...
A TXV
The contactor coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Refrigerant must be added to the system

28. What is the 'are' terminal used for on the thermostat...
Metering device
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Insulated
The power from the transformer

29. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
The temperature increases
Condenser
A compression fitting
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

30. What is the 'Y' terminal used for on the thermostat...
The accumulator
Must be located in a conspicuous place to serve as an alarm
The cooling contactor coil
The temperature increases

31. What is the purpose for insulating a suction line...
The accumulator
To prevent condensation from forming
Evaporator
208-volt/240-volt single-phase power supply

32. If ductwork is located in an attic or crawl space - it must be...
Condenser
Insulated
Evaporator
Metering device

33. A room thermostat should be mounted...
The lines must be covered by PVC to prevent contact with the masonry material
Near a return-air grill
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
24 volts

34. What type of metering device is used on a 12 SEER split air conditioning system...
Insulated
Evaporator
Metering device (restrictor)
A TXV

35. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
Condenser
Insulated
208-volt/240-volt single-phase power supply
The temperature increases

36. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
Check for tight connections at electrical terminals
Insulated
Metering device
Must be coiled horizontally and the vapor must flow from top to bottom

37. Which part of the system stores refrigerant until it is needed in the evaporator...
The power from the transformer
The coil is precharged with nitrogen
Compressor
The receiver

38. Residential split-system outdoor condensing units are commonly wired with a...
208-volt/240-volt single-phase power supply
Evaporator
Near a return-air grill
Condenser

39. A split-system air conditioning unit has...
Evaporator
Near a return-air grill
The receiver
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

40. In a sealed system - as the pressure increases...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The accumulator
A compression fitting
The temperature increases

41. Why is it recommended to add a gravel fill under the pad of a condensing unit...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
This will prevent settling of the ground - which can cause refrigerant line damage
Metering device
Precharged refrigeration linesets

42. What is the purpose for insulating a suction line...
The receiver
Compressor
Must be coiled horizontally and the vapor must flow from top to bottom
To prevent condensation from forming

43. Which part of the system prevents liquid from entering the compressor...
The accumulator
Must be coiled horizontally and the vapor must flow from top to bottom
Metering device (restrictor)
208-volt/240-volt single-phase power supply

44. Why is it recommended to add a gravel fill under the pad of a condensing unit...
Precharged refrigeration linesets
This will prevent settling of the ground - which can cause refrigerant line damage
A compression fitting
The power from the transformer

45. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
24 volts
The lines must be covered by PVC to prevent contact with the masonry material
Insulated
Evaporator

46. To ensure proper oil return to the compressor - when installing a refrigeration line set...
The power from the transformer
The cooling contactor coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The suction line must be pitched toward the condensing unit

47. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The contactor coil
Metering device
The power from the transformer
Near a return-air grill

48. A secondary drain line...
A TXV
This will prevent settling of the ground - which can cause refrigerant line damage
Must be located in a conspicuous place to serve as an alarm
The suction line must be pitched toward the condensing unit

49. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Compressor
208-volt/240-volt single-phase power supply
The temperature increases
The power from the transformer

50. Before energizing a newly installed system - what test should always be done...
24 volts
The power from the transformer
Check for tight connections at electrical terminals
A TXV