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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. 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 accumulator
Refrigerant must be added to the system
Precharged refrigeration linesets
Compressor

2. What type of metering device is used on a 12 SEER split air conditioning system...
Insulated
A TXV
Condenser
The suction line must be pitched toward the condensing unit

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

4. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
Precharged refrigeration linesets
Capillary action
Metering device
The coil is precharged with nitrogen

5. Why is it recommended to add a gravel fill under the pad of a condensing unit...
This will prevent settling of the ground - which can cause refrigerant line damage
The cooling contactor coil
The receiver
The accumulator

6. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Metering device (restrictor)
The temperature increases
The power from the transformer
Must be located in a conspicuous place to serve as an alarm

7. Which part of the system prevents liquid from entering the compressor...
Metering device (restrictor)
The contactor coil
Compressor
The accumulator

8. Residential split-system outdoor condensing units are commonly wired with a...
A TXV
208-volt/240-volt single-phase power supply
The suction line must be pitched toward the condensing unit
Condenser

9. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Condenser
The power from the transformer
Must be located in a conspicuous place to serve as an alarm
Must be located in a conspicuous place to serve as an alarm

10. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
208-volt/240-volt single-phase power supply
Capillary action
The temperature increases
The coil is precharged with nitrogen

11. Quick-connect fittings are commonly used on...
A TXV
Condenser
Precharged refrigeration linesets
The accumulator

12. Quick-connect fittings are commonly used on...
Compressor
The cooling contactor coil
Precharged refrigeration linesets
The heating control circuit

13. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
The temperature increases
To prevent condensation from forming
Evaporator
Condenser

14. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
A compression fitting
Compressor
24 volts
Must be coiled horizontally and the vapor must flow from top to bottom

15. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The contactor coil
The lines must be covered by PVC to prevent contact with the masonry material
Evaporator
Near a return-air grill

16. What is the purpose for insulating a suction line...
Precharged refrigeration linesets
A compression fitting
To prevent condensation from forming
Near a return-air grill

17. An auxiliary drain pan must...

18. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Check for tight connections at electrical terminals
The coil is precharged with nitrogen
Compressor
The suction line must be pitched toward the condensing unit

19. A secondary drain line...
Must be located in a conspicuous place to serve as an alarm
The coil is precharged with nitrogen
To prevent condensation from forming
Evaporator

20. 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 (restrictor)
Precharged refrigeration linesets
Metering device
The receiver

21. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
A compression fitting
Compressor
Near a return-air grill
Capillary action

22. Which part of the system stores refrigerant until it is needed in the evaporator...
The blower relay coil
The receiver
Metering device
Condenser

23. What is the 'Y' terminal used for on the thermostat...
Compressor
Insulated
The coil is precharged with nitrogen
The cooling contactor coil

24. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Compressor
Condenser
208-volt/240-volt single-phase power supply
Evaporator

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

26. A secondary drain line...
The cooling contactor coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Must be located in a conspicuous place to serve as an alarm
A TXV

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

28. What is the 'are' terminal used for on the thermostat...
The power from the transformer
The accumulator
The lines must be covered by PVC to prevent contact with the masonry material
Near a return-air grill

29. If ductwork is located in an attic or crawl space - it must be...
Must be coiled horizontally and the vapor must flow from top to bottom
Metering device (restrictor)
Insulated
The contactor coil

30. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
Evaporator
Insulated
Have a minimum perimeter of 3' larger than the unit being served
Must be coiled horizontally and the vapor must flow from top to bottom

31. Before energizing a newly installed system - what test should always be done...
The receiver
Check for tight connections at electrical terminals
Have a minimum perimeter of 3' larger than the unit being served
Condenser

32. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Must be located in a conspicuous place to serve as an alarm
Insulated
Compressor
To prevent condensation from forming

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

34. Before energizing a newly installed system - what test should always be done...
Check for tight connections at electrical terminals
A compression fitting
Condenser
Must be located in a conspicuous place to serve as an alarm

35. A split-system air conditioning unit has...
Must be located in a conspicuous place to serve as an alarm
A compression fitting
A TXV
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

36. To ensure proper oil return to the compressor - when installing a refrigeration line set...
The suction line must be pitched toward the condensing unit
Must be located in a conspicuous place to serve as an alarm
Refrigerant must be added to the system
A TXV

37. Residential split-system outdoor condensing units are commonly wired with a...
24 volts
Metering device
208-volt/240-volt single-phase power supply
A TXV

38. When installing a refrigeration line set through a masonry wall
The lines must be covered by PVC to prevent contact with the masonry material
24 volts
Have a minimum perimeter of 3' larger than the unit being served
Refrigerant must be added to the system

39. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
The receiver
Evaporator
The power from the transformer
Metering device (restrictor)

40. To ensure proper oil return to the compressor - when installing a refrigeration line set...
The suction line must be pitched toward the condensing unit
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The coil is precharged with nitrogen
Compressor

41. What is the 'are' terminal used for on the thermostat...
The power from the transformer
The blower relay coil
Condenser
The lines must be covered by PVC to prevent contact with the masonry material

42. Which part of the system stores refrigerant until it is needed in the evaporator...
The receiver
Condenser
Must be coiled horizontally and the vapor must flow from top to bottom
Capillary action

43. What is the purpose for insulating a suction line...
Compressor
The accumulator
The receiver
To prevent condensation from forming

44. What is the secondary voltage on a step-down control transformer for a residential furnace...
To prevent condensation from forming
Near a return-air grill
24 volts
The heating control circuit

45. What type of metering device is used on a 12 SEER split air conditioning system...
208-volt/240-volt single-phase power supply
The temperature increases
A TXV
The power from the transformer

46. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Compressor
Evaporator
The blower relay coil
Evaporator

47. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The contactor coil
Evaporator
Have a minimum perimeter of 3' larger than the unit being served
Must be located in a conspicuous place to serve as an alarm

48. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
The heating control circuit
Condenser
The power from the transformer
To prevent condensation from forming

49. Which part of the system prevents liquid from entering the compressor...
The accumulator
Near a return-air grill
Metering device (restrictor)
Compressor

50. What is the 'G' terminal used for on the thermostat...
The coil is precharged with nitrogen
The blower relay coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The receiver