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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. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
Evaporator
The coil is precharged with nitrogen
Must be coiled horizontally and the vapor must flow from top to bottom
The receiver

2. What type of fitting uses an O-ring to help seal its joint...
A compression fitting
Metering device
Must be coiled horizontally and the vapor must flow from top to bottom
To prevent condensation from forming

3. What is the 'G' terminal used for on the thermostat...
Insulated
A compression fitting
The blower relay coil
Must be coiled horizontally and the vapor must flow from top to bottom

4. If ductwork is located in an attic or crawl space - it must be...
The contactor coil
Insulated
208-volt/240-volt single-phase power supply
To prevent condensation from forming

5. What is the 'are' terminal used for on the thermostat...
Precharged refrigeration linesets
Metering device (restrictor)
The heating control circuit
The power from the transformer

6. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
208-volt/240-volt single-phase power supply
Have a minimum perimeter of 3' larger than the unit being served
Metering device (restrictor)
A TXV

7. What is the secondary voltage on a step-down control transformer for a residential furnace...
24 volts
Compressor
208-volt/240-volt single-phase power supply
A compression fitting

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

9. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
The receiver
Evaporator
Compressor
Condenser

10. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Metering device (restrictor)
Refrigerant must be added to the system
Compressor
A compression fitting

11. Which part of the system stores refrigerant until it is needed in the evaporator...
The cooling contactor coil
Capillary action
The receiver
The power from the transformer

12. 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
Evaporator
Metering device (restrictor)
Compressor

13. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The power from the transformer
The accumulator
The contactor coil
24 volts

14. Which part of the system prevents liquid from entering the compressor...
The contactor coil
The accumulator
Metering device (restrictor)
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

15. What type of fitting uses an O-ring to help seal its joint...
208-volt/240-volt single-phase power supply
Must be coiled horizontally and the vapor must flow from top to bottom
A compression fitting
The temperature increases

16. What type of metering device is used on a 12 SEER split air conditioning system...
Compressor
This will prevent settling of the ground - which can cause refrigerant line damage
Near a return-air grill
A TXV

17. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Metering device (restrictor)
Condenser
24 volts
Must be coiled horizontally and the vapor must flow from top to bottom

18. Which part of the system stores refrigerant until it is needed in the evaporator...
Evaporator
Have a minimum perimeter of 3' larger than the unit being served
The receiver
Have a minimum perimeter of 3' larger than the unit being served

19. Quick-connect fittings are commonly used on...
The accumulator
A TXV
Metering device (restrictor)
Precharged refrigeration linesets

20. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
Insulated
Insulated
Compressor
Metering device

21. An auxiliary drain pan must...

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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 blower relay coil
This will prevent settling of the ground - which can cause refrigerant line damage

23. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
The coil is precharged with nitrogen
The power from the transformer
Condenser
To prevent condensation from forming

24. If ductwork is located in an attic or crawl space - it must be...
The heating control circuit
A compression fitting
Condenser
Insulated

25. What is the purpose for insulating a suction line...
Metering device (restrictor)
The accumulator
The blower relay coil
To prevent condensation from forming

26. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Compressor
Evaporator
Compressor
Must be coiled horizontally and the vapor must flow from top to bottom

27. Before energizing a newly installed system - what test should always be done...
To prevent condensation from forming
Must be coiled horizontally and the vapor must flow from top to bottom
Check for tight connections at electrical terminals
208-volt/240-volt single-phase power supply

28. What must be done to the system when a condensing unit is precharged for 25' of refrigerant line and uses 32' of refrigerant line...
To prevent condensation from forming
Refrigerant must be added to the system
Metering device
The receiver

29. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
Metering device (restrictor)
Must be coiled horizontally and the vapor must flow from top to bottom
Compressor
Condenser

30. What is the 'W' terminal used for on the thermostat...
The cooling contactor coil
Compressor
The heating control circuit
The contactor coil

31. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Evaporator
The temperature increases
The coil is precharged with nitrogen
Capillary action

32. An auxiliary drain pan must...

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33. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Metering device (restrictor)
The suction line must be pitched toward the condensing unit
The accumulator
Capillary action

34. Residential split-system outdoor condensing units are commonly wired with a...
Condenser
Condenser
The coil is precharged with nitrogen
208-volt/240-volt single-phase power supply

35. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Capillary action
The heating control circuit
24 volts
The power from the transformer

36. What is the 'G' terminal used for on the thermostat...
Near a return-air grill
Compressor
The blower relay coil
The temperature increases

37. A room thermostat should be mounted...
The coil is precharged with nitrogen
Must be located in a conspicuous place to serve as an alarm
Compressor
Near a return-air grill

38. What type of metering device is used on a 12 SEER split air conditioning system...
The coil is precharged with nitrogen
A TXV
The power from the transformer
The cooling contactor coil

39. What is the 'W' terminal used for on the thermostat...
Insulated
The heating control circuit
The cooling contactor coil
The receiver

40. Which part of the system prevents liquid from entering the compressor...
A compression fitting
The power from the transformer
The cooling contactor coil
The accumulator

41. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
Insulated
Must be located in a conspicuous place to serve as an alarm
Condenser
The temperature increases

42. To ensure proper oil return to the compressor - when installing a refrigeration line set...
Refrigerant must be added to the system
Metering device (restrictor)
The suction line must be pitched toward the condensing unit
The blower relay coil

43. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
The contactor coil
The cooling contactor coil
24 volts
Evaporator

44. Residential split-system outdoor condensing units are commonly wired with a...
Compressor
Metering device
208-volt/240-volt single-phase power supply
The lines must be covered by PVC to prevent contact with the masonry material

45. A room thermostat should be mounted...
The accumulator
The temperature increases
The power from the transformer
Near a return-air grill

46. When installing a refrigeration line set through a masonry wall
The lines must be covered by PVC to prevent contact with the masonry material
The temperature increases
Metering device (restrictor)
Refrigerant must be added to the system

47. In a sealed system - as the pressure increases...
The temperature increases
The receiver
The heating control circuit
Have a minimum perimeter of 3' larger than the unit being served

48. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
Condenser
The receiver
Must be coiled horizontally and the vapor must flow from top to bottom
The heating control circuit

49. A secondary drain line...
Must be located in a conspicuous place to serve as an alarm
The coil is precharged with nitrogen
Check for tight connections at electrical terminals
The temperature increases

50. A split-system air conditioning unit has...
Metering device
To prevent condensation from forming
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