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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...
Metering device (restrictor)
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Must be coiled horizontally and the vapor must flow from top to bottom
Refrigerant must be added to the system

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

3. An auxiliary drain pan must...

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4. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The receiver
208-volt/240-volt single-phase power supply
Capillary action

5. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Evaporator
The temperature increases
The power from the transformer
Near a return-air grill

6. Why is it recommended to add a gravel fill under the pad of a condensing unit...
Compressor
Condenser
This will prevent settling of the ground - which can cause refrigerant line damage
Evaporator

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

8. Which part of the system prevents liquid from entering the compressor...
Compressor
24 volts
The accumulator
Near a return-air grill

9. A split-system air conditioning unit has...
The cooling contactor coil
Compressor
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Metering device

10. What type of fitting uses an O-ring to help seal its joint...
A compression fitting
The blower relay coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The blower relay coil

11. Residential split-system outdoor condensing units are commonly wired with a...
Compressor
The power from the transformer
208-volt/240-volt single-phase power supply
Compressor

12. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Must be located in a conspicuous place to serve as an alarm
Compressor
Evaporator
The suction line must be pitched toward the condensing unit

13. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Check for tight connections at electrical terminals
Must be coiled horizontally and the vapor must flow from top to bottom
Capillary action
The coil is precharged with nitrogen

14. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Near a return-air grill
Metering device (restrictor)
The heating control circuit
Must be coiled horizontally and the vapor must flow from top to bottom

15. 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 contactor coil
Have a minimum perimeter of 3' larger than the unit being served
The receiver

16. What is the 'Y' terminal used for on the thermostat...
Refrigerant must be added to the system
The cooling contactor coil
The temperature increases
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

17. An auxiliary drain pan must...

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18. What is the 'W' terminal used for on the thermostat...
Refrigerant must be added to the system
The temperature increases
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The heating control circuit

19. Residential split-system outdoor condensing units are commonly wired with a...
A TXV
A TXV
Precharged refrigeration linesets
208-volt/240-volt single-phase power supply

20. When installing a refrigeration line set through a masonry wall
The suction line must be pitched toward the condensing unit
The heating control circuit
208-volt/240-volt single-phase power supply
The lines must be covered by PVC to prevent contact with the masonry material

21. What type of metering device is used on a 12 SEER split air conditioning system...
To prevent condensation from forming
A TXV
The accumulator
Metering device

22. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
The cooling contactor coil
Near a return-air grill
Evaporator
Condenser

23. What is the 'G' terminal used for on the thermostat...
The blower relay coil
This will prevent settling of the ground - which can cause refrigerant line damage
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Near a return-air grill

24. What is the purpose for insulating a suction line...
To prevent condensation from forming
Must be coiled horizontally and the vapor must flow from top to bottom
Must be coiled horizontally and the vapor must flow from top to bottom
Metering device

25. Before energizing a newly installed system - what test should always be done...
Check for tight connections at electrical terminals
Compressor
The suction line must be pitched toward the condensing unit
The temperature increases

26. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Condenser
The receiver
Must be located in a conspicuous place to serve as an alarm
The lines must be covered by PVC to prevent contact with the masonry material

27. In a sealed system - as the pressure increases...
The temperature increases
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Near a return-air grill
Capillary action

28. A secondary drain line...
The receiver
Precharged refrigeration linesets
Must be located in a conspicuous place to serve as an alarm
The suction line must be pitched toward the condensing unit

29. A split-system air conditioning unit has...
The suction line must be pitched toward the condensing unit
Condenser
The coil is precharged with nitrogen
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

30. What is the 'G' terminal used for on the thermostat...
Capillary action
The blower relay coil
The power from the transformer
Metering device

31. To ensure proper oil return to the compressor - when installing a refrigeration line set...
208-volt/240-volt single-phase power supply
The suction line must be pitched toward the condensing unit
This will prevent settling of the ground - which can cause refrigerant line damage
Capillary action

32. Before energizing a newly installed system - what test should always be done...
Near a return-air grill
Evaporator
Check for tight connections at electrical terminals
The lines must be covered by PVC to prevent contact with the masonry material

33. To ensure proper oil return to the compressor - when installing a refrigeration line set...
Check for tight connections at electrical terminals
Must be coiled horizontally and the vapor must flow from top to bottom
Condenser
The suction line must be pitched toward the condensing unit

34. 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
Must be coiled horizontally and the vapor must flow from top to bottom
Insulated
Condenser

35. If ductwork is located in an attic or crawl space - it must be...
The coil is precharged with nitrogen
Insulated
Metering device (restrictor)
Condenser

36. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
The lines must be covered by PVC to prevent contact with the masonry material
Condenser
The power from the transformer
Metering device

37. What type of fitting uses an O-ring to help seal its joint...
Compressor
Precharged refrigeration linesets
The blower relay coil
A compression fitting

38. Quick-connect fittings are commonly used on...
Precharged refrigeration linesets
Refrigerant must be added to the system
The receiver
Near a return-air grill

39. Which part of the system stores refrigerant until it is needed in the evaporator...
208-volt/240-volt single-phase power supply
The contactor coil
The receiver
Near a return-air grill

40. In a sealed system - as the pressure increases...
The coil is precharged with nitrogen
Condenser
Near a return-air grill
The temperature increases

41. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Condenser
To prevent condensation from forming
Check for tight connections at electrical terminals
Near a return-air grill

42. What is the 'W' terminal used for on the thermostat...
The heating control circuit
The coil is precharged with nitrogen
Condenser
Capillary action

43. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
24 volts
Condenser
A compression fitting
Evaporator

44. What is the secondary voltage on a step-down control transformer for a residential furnace...
24 volts
Near a return-air grill
The temperature increases
The receiver

45. If ductwork is located in an attic or crawl space - it must be...
Insulated
A compression fitting
Must be coiled horizontally and the vapor must flow from top to bottom
Must be coiled horizontally and the vapor must flow from top to bottom

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

47. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
Capillary action
To prevent condensation from forming
Condenser
Have a minimum perimeter of 3' larger than the unit being served

48. A room thermostat should be mounted...
Insulated
The suction line must be pitched toward the condensing unit
Near a return-air grill
Capillary action

49. Which part of the system stores refrigerant until it is needed in the evaporator...
Insulated
The coil is precharged with nitrogen
The receiver
Precharged refrigeration linesets

50. Which part of the system prevents liquid from entering the compressor...
To prevent condensation from forming
The accumulator
The temperature increases
The cooling contactor coil