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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 installing a refrigeration line set through a masonry wall
The lines must be covered by PVC to prevent contact with the masonry material
A compression fitting
The cooling contactor coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

2. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Compressor
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The power from the transformer
24 volts

3. What type of fitting uses an O-ring to help seal its joint...
Evaporator
Evaporator
A compression fitting
Must be located in a conspicuous place to serve as an alarm

4. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
A TXV
Evaporator
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Metering device (restrictor)

5. An auxiliary drain pan must...

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6. Residential split-system outdoor condensing units are commonly wired with a...
The cooling contactor coil
The temperature increases
208-volt/240-volt single-phase power supply
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

7. To ensure proper oil return to the compressor - when installing a refrigeration line set...
Must be coiled horizontally and the vapor must flow from top to bottom
This will prevent settling of the ground - which can cause refrigerant line damage
The heating control circuit
The suction line must be pitched toward the condensing unit

8. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
Metering device
208-volt/240-volt single-phase power supply
Precharged refrigeration linesets
The temperature increases

9. A secondary drain line...
Near a return-air grill
Must be located in a conspicuous place to serve as an alarm
The suction line must be pitched toward the condensing unit
The lines must be covered by PVC to prevent contact with the masonry material

10. What is the 'Y' terminal used for on the thermostat...
The cooling contactor coil
The blower relay coil
This will prevent settling of the ground - which can cause refrigerant line damage
Must be coiled horizontally and the vapor must flow from top to bottom

11. Why is it recommended to add a gravel fill under the pad of a condensing unit...
The heating control circuit
Refrigerant must be added to the system
208-volt/240-volt single-phase power supply
This will prevent settling of the ground - which can cause refrigerant line damage

12. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Condenser
Metering device (restrictor)
A TXV
The suction line must be pitched toward the condensing unit

13. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Compressor
Insulated
The lines must be covered by PVC to prevent contact with the masonry material
Evaporator

14. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
The contactor coil
The contactor coil
Insulated
The coil is precharged with nitrogen

15. What type of fitting uses an O-ring to help seal its joint...
The blower relay coil
Check for tight connections at electrical terminals
A compression fitting
Compressor

16. A secondary drain line...
Must be located in a conspicuous place to serve as an alarm
Check for tight connections at electrical terminals
Metering device
Metering device (restrictor)

17. What is the 'Y' terminal used for on the thermostat...
The cooling contactor coil
The power from the transformer
The blower relay coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

18. A split-system air conditioning unit has...
The accumulator
208-volt/240-volt single-phase power supply
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
A TXV

19. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Capillary action
Condenser
The accumulator
Compressor

20. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
The power from the transformer
The suction line must be pitched toward the condensing unit
The contactor coil
Condenser

21. What is the 'G' terminal used for on the thermostat...
The temperature increases
The cooling contactor coil
The coil is precharged with nitrogen
The blower relay coil

22. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Compressor
A compression fitting
The receiver
Metering device (restrictor)

23. 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 receiver
Must be located in a conspicuous place to serve as an alarm
Refrigerant must be added to the system

24. Why is it recommended to add a gravel fill under the pad of a condensing unit...
Condenser
This will prevent settling of the ground - which can cause refrigerant line damage
The temperature increases
24 volts

25. What is the 'G' terminal used for on the thermostat...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The blower relay coil
The accumulator
Metering device (restrictor)

26. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
To prevent condensation from forming
Evaporator
A compression fitting
Capillary action

27. Quick-connect fittings are commonly used on...
Compressor
Precharged refrigeration linesets
The receiver
A TXV

28. A room thermostat should be mounted...
Near a return-air grill
Precharged refrigeration linesets
Compressor
208-volt/240-volt single-phase power supply

29. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
A compression fitting
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The heating control circuit
Evaporator

30. An auxiliary drain pan must...

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31. A room thermostat should be mounted...
The heating control circuit
Near a return-air grill
Precharged refrigeration linesets
Capillary action

32. If ductwork is located in an attic or crawl space - it must be...
Metering device
The contactor coil
The suction line must be pitched toward the condensing unit
Insulated

33. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
24 volts
Condenser
Metering device (restrictor)
The accumulator

34. Before energizing a newly installed system - what test should always be done...
Compressor
Check for tight connections at electrical terminals
The contactor coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

35. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
To prevent condensation from forming
Metering device
Evaporator
Compressor

36. What is the purpose for insulating a suction line...
The contactor coil
To prevent condensation from forming
Condenser
Near a return-air grill

37. 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 power from the transformer
Condenser
Check for tight connections at electrical terminals
Refrigerant must be added to the system

38. What is the 'are' terminal used for on the thermostat...
Capillary action
The cooling contactor coil
The receiver
The power from the transformer

39. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
Must be located in a conspicuous place to serve as an alarm
Evaporator
Condenser
Metering device

40. What is the secondary voltage on a step-down control transformer for a residential furnace...
208-volt/240-volt single-phase power supply
Metering device (restrictor)
24 volts
Refrigerant must be added to the system

41. 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
Insulated
The cooling contactor coil
Metering device (restrictor)

42. In a sealed system - as the pressure increases...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Compressor
The temperature increases
Must be located in a conspicuous place to serve as an alarm

43. In a sealed system - as the pressure increases...
The contactor coil
The temperature increases
The cooling contactor coil
24 volts

44. Residential split-system outdoor condensing units are commonly wired with a...
208-volt/240-volt single-phase power supply
Metering device (restrictor)
Compressor
Have a minimum perimeter of 3' larger than the unit being served

45. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The contactor coil
The suction line must be pitched toward the condensing unit
Evaporator
Condenser

46. What is the 'are' terminal used for on the thermostat...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The power from the transformer
Must be located in a conspicuous place to serve as an alarm
The blower relay coil

47. Which part of the system stores refrigerant until it is needed in the evaporator...
The lines must be covered by PVC to prevent contact with the masonry material
Check for tight connections at electrical terminals
The accumulator
The receiver

48. When installing a refrigeration line set through a masonry wall
The lines must be covered by PVC to prevent contact with the masonry material
Have a minimum perimeter of 3' larger than the unit being served
Metering device
A TXV

49. Which part of the system stores refrigerant until it is needed in the evaporator...
Metering device (restrictor)
The receiver
Metering device
The heating control circuit

50. What type of metering device is used on a 12 SEER split air conditioning system...
The blower relay coil
Condenser
A TXV
The cooling contactor coil