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

2. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
Condenser
The accumulator
Compressor
Metering device (restrictor)

3. What is the 'Y' terminal used for on the thermostat...
The heating control circuit
The cooling contactor coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
A TXV

4. When installing a refrigeration line set through a masonry wall
Refrigerant must be added to the system
The lines must be covered by PVC to prevent contact with the masonry material
Capillary action
The contactor coil

5. Residential split-system outdoor condensing units are commonly wired with a...
The lines must be covered by PVC to prevent contact with the masonry material
The coil is precharged with nitrogen
Check for tight connections at electrical terminals
208-volt/240-volt single-phase power supply

6. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Metering device (restrictor)
Near a return-air grill
Compressor
The blower relay coil

7. To ensure proper oil return to the compressor - when installing a refrigeration line set...
The suction line must be pitched toward the condensing unit
A TXV
24 volts
The lines must be covered by PVC to prevent contact with the masonry material

8. 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
Metering device
Evaporator
To prevent condensation from forming

9. If ductwork is located in an attic or crawl space - it must be...
The power from the transformer
The contactor coil
Near a return-air grill
Insulated

10. What is the 'are' terminal used for on the thermostat...
Must be located in a conspicuous place to serve as an alarm
24 volts
The power from the transformer
A compression fitting

11. 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 suction line must be pitched toward the condensing unit
A compression fitting
Refrigerant must be added to the system
The receiver

12. Which part of the system stores refrigerant until it is needed in the evaporator...
The receiver
Check for tight connections at electrical terminals
Compressor
Compressor

13. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
The coil is precharged with nitrogen
Evaporator
Refrigerant must be added to the system
24 volts

14. What type of metering device is used on a 12 SEER split air conditioning system...
The cooling contactor coil
Metering device
A compression fitting
A TXV

15. A secondary drain line...
Must be located in a conspicuous place to serve as an alarm
The contactor coil
Must be coiled horizontally and the vapor must flow from top to bottom
The blower relay coil

16. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The temperature increases
A TXV
Metering device (restrictor)
The contactor coil

17. A room thermostat should be mounted...
Must be located in a conspicuous place to serve as an alarm
Have a minimum perimeter of 3' larger than the unit being served
Near a return-air grill
The blower relay coil

18. What is the 'are' terminal used for on the thermostat...
The receiver
A compression fitting
The power from the transformer
Condenser

19. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The heating control circuit
A compression fitting
The contactor coil
Near a return-air grill

20. Which part of the system stores refrigerant until it is needed in the evaporator...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The receiver
To prevent condensation from forming
The cooling contactor coil

21. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
Metering device (restrictor)
The blower relay coil
A TXV
Must be coiled horizontally and the vapor must flow from top to bottom

22. A secondary drain line...
Evaporator
The blower relay coil
The power from the transformer
Must be located in a conspicuous place to serve as an alarm

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

24. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
The accumulator
Metering device
Evaporator
Metering device

25. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
The blower relay coil
Metering device
Have a minimum perimeter of 3' larger than the unit being served
Check for tight connections at electrical terminals

26. Quick-connect fittings are commonly used on...
The accumulator
The blower relay coil
Precharged refrigeration linesets
The power from the transformer

27. A split-system air conditioning unit has...
The lines must be covered by PVC to prevent contact with the masonry material
Must be coiled horizontally and the vapor must flow from top to bottom
Near a return-air grill
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

28. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
The suction line must be pitched toward the condensing unit
Compressor
The heating control circuit
24 volts

29. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
The coil is precharged with nitrogen
Have a minimum perimeter of 3' larger than the unit being served
Condenser
The heating control circuit

30. To ensure proper oil return to the compressor - when installing a refrigeration line set...
Capillary action
Compressor
The suction line must be pitched toward the condensing unit
Near a return-air grill

31. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
Insulated
The power from the transformer
The coil is precharged with nitrogen
Capillary action

32. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
The contactor coil
A TXV
The cooling contactor coil
Compressor

33. Quick-connect fittings are commonly used on...
The heating control circuit
Have a minimum perimeter of 3' larger than the unit being served
Metering device
Precharged refrigeration linesets

34. Before energizing a newly installed system - what test should always be done...
Check for tight connections at electrical terminals
Refrigerant must be added to the system
The lines must be covered by PVC to prevent contact with the masonry material
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

35. What is the 'W' terminal used for on the thermostat...
A TXV
Capillary action
The receiver
The heating control circuit

36. A room thermostat should be mounted...
Near a return-air grill
Condenser
Insulated
Compressor

37. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
The receiver
Compressor
Near a return-air grill
Precharged refrigeration linesets

38. 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 compression fitting
Evaporator
Refrigerant must be added to the system
Have a minimum perimeter of 3' larger than the unit being served

39. Why is it recommended to add a gravel fill under the pad of a condensing unit...
The coil is precharged with nitrogen
This will prevent settling of the ground - which can cause refrigerant line damage
208-volt/240-volt single-phase power supply
Must be coiled horizontally and the vapor must flow from top to bottom

40. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
The lines must be covered by PVC to prevent contact with the masonry material
The lines must be covered by PVC to prevent contact with the masonry material
24 volts
Condenser

41. An auxiliary drain pan must...

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42. Which part of the system prevents liquid from entering the compressor...
A compression fitting
The lines must be covered by PVC to prevent contact with the masonry material
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The accumulator

43. What type of fitting uses an O-ring to help seal its joint...
Must be located in a conspicuous place to serve as an alarm
Capillary action
Metering device (restrictor)
A compression fitting

44. What is the purpose for insulating a suction line...
The receiver
To prevent condensation from forming
The cooling contactor coil
The power from the transformer

45. An auxiliary drain pan must...

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46. If ductwork is located in an attic or crawl space - it must be...
Must be located in a conspicuous place to serve as an alarm
Insulated
The cooling contactor coil
Precharged refrigeration linesets

47. What is the 'G' terminal used for on the thermostat...
The blower relay coil
Compressor
The receiver
Must be coiled horizontally and the vapor must flow from top to bottom

48. A split-system air conditioning unit has...
Evaporator
The receiver
Must be coiled horizontally and the vapor must flow from top to bottom
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

49. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
Compressor
The cooling contactor coil
Metering device
24 volts

50. What type of metering device is used on a 12 SEER split air conditioning system...
Metering device
Must be located in a conspicuous place to serve as an alarm
A TXV
The cooling contactor coil