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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. Residential split-system outdoor condensing units are commonly wired with a...
24 volts
The temperature increases
The accumulator
208-volt/240-volt single-phase power supply

2. What is the 'Y' terminal used for on the thermostat...
The cooling contactor coil
The lines must be covered by PVC to prevent contact with the masonry material
A TXV
Metering device (restrictor)

3. Which part of the system stores refrigerant until it is needed in the evaporator...
The heating control circuit
The accumulator
The receiver
The cooling contactor coil

4. When installing a refrigeration line set through a masonry wall
The blower relay coil
The lines must be covered by PVC to prevent contact with the masonry material
Metering device (restrictor)
Condenser

5. Before energizing a newly installed system - what test should always be done...
A compression fitting
Precharged refrigeration linesets
208-volt/240-volt single-phase power supply
Check for tight connections at electrical terminals

6. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Compressor
Evaporator
This will prevent settling of the ground - which can cause refrigerant line damage
The heating control circuit

7. When installing a refrigeration line set through a masonry wall
24 volts
The lines must be covered by PVC to prevent contact with the masonry material
A TXV
Must be coiled horizontally and the vapor must flow from top to bottom

8. What type of fitting uses an O-ring to help seal its joint...
Evaporator
A compression fitting
24 volts
Have a minimum perimeter of 3' larger than the unit being served

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

10. What is the 'W' terminal used for on the thermostat...
The heating control circuit
24 volts
The cooling contactor coil
The accumulator

11. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Near a return-air grill
The receiver
Check for tight connections at electrical terminals
Compressor

12. What is the secondary voltage on a step-down control transformer for a residential furnace...
Compressor
The blower relay coil
208-volt/240-volt single-phase power supply
24 volts

13. If ductwork is located in an attic or crawl space - it must be...
Compressor
Insulated
The receiver
Condenser

14. A room thermostat should be mounted...
Must be coiled horizontally and the vapor must flow from top to bottom
Near a return-air grill
The coil is precharged with nitrogen
Metering device (restrictor)

15. Quick-connect fittings are commonly used on...
Condenser
24 volts
This will prevent settling of the ground - which can cause refrigerant line damage
Precharged refrigeration linesets

16. In a sealed system - as the pressure increases...
Compressor
A compression fitting
Must be coiled horizontally and the vapor must flow from top to bottom
The temperature increases

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

18. Which part of the system prevents liquid from entering the compressor...
The accumulator
The temperature increases
Capillary action
The suction line must be pitched toward the condensing unit

19. 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 heating control circuit
Compressor
The cooling contactor coil

20. An auxiliary drain pan must...

21. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Precharged refrigeration linesets
24 volts
Capillary action
Condenser

22. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
24 volts
The contactor coil
Refrigerant must be added to the system
The cooling contactor coil

23. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Capillary action
Near a return-air grill
Refrigerant must be added to the system
Metering device (restrictor)

24. An auxiliary drain pan must...

25. A secondary drain line...
The cooling contactor coil
The blower relay coil
Check for tight connections at electrical terminals
Must be located in a conspicuous place to serve as an alarm

26. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
The suction line must be pitched toward the condensing unit
Must be coiled horizontally and the vapor must flow from top to bottom
208-volt/240-volt single-phase power supply
The blower relay coil

27. Residential split-system outdoor condensing units are commonly wired with a...
Check for tight connections at electrical terminals
Refrigerant must be added to the system
208-volt/240-volt single-phase power supply
Compressor

28. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Refrigerant must be added to the system
Evaporator
The lines must be covered by PVC to prevent contact with the masonry material
24 volts

29. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Compressor
Check for tight connections at electrical terminals
A compression fitting
This will prevent settling of the ground - which can cause refrigerant line damage

30. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
To prevent condensation from forming
Metering device (restrictor)
Compressor
24 volts

31. What must be done to the system when a condensing unit is precharged for 25' of refrigerant line and uses 32' of refrigerant line...
Refrigerant must be added to the system
Must be coiled horizontally and the vapor must flow from top to bottom
The blower relay coil
208-volt/240-volt single-phase power supply

32. What is the 'G' terminal used for on the thermostat...
Condenser
The coil is precharged with nitrogen
The blower relay coil
Compressor

33. What is the 'are' terminal used for on the thermostat...
The blower relay coil
The coil is precharged with nitrogen
The power from the transformer
Condenser

34. What is the purpose for insulating a suction line...
The receiver
A compression fitting
To prevent condensation from forming
This will prevent settling of the ground - which can cause refrigerant line damage

35. 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
Must be located in a conspicuous place to serve as an alarm
The contactor coil
The heating control circuit

36. What type of metering device is used on a 12 SEER split air conditioning system...
The lines must be covered by PVC to prevent contact with the masonry material
A TXV
Insulated
Evaporator

37. Before energizing a newly installed system - what test should always be done...
Check for tight connections at electrical terminals
Capillary action
Must be coiled horizontally and the vapor must flow from top to bottom
Metering device

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

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

40. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Evaporator
Refrigerant must be added to the system
Precharged refrigeration linesets
208-volt/240-volt single-phase power supply

41. A secondary drain line...
The cooling contactor coil
Refrigerant must be added to the system
The blower relay coil
Must be located in a conspicuous place to serve as an alarm

42. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Condenser
Compressor
Capillary action
To prevent condensation from forming

43. 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 compressor and condenser connected by a refrigeration line set to the metering device and evaporator
A compression fitting
This will prevent settling of the ground - which can cause refrigerant line damage

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

45. Which part of the system prevents liquid from entering the compressor...
The accumulator
A TXV
Check for tight connections at electrical terminals
To prevent condensation from forming

46. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
A compression fitting
Condenser
208-volt/240-volt single-phase power supply
24 volts

47. What is the secondary voltage on a step-down control transformer for a residential furnace...
24 volts
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
The receiver

48. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
Evaporator
A compression fitting
The suction line must be pitched toward the condensing unit
Condenser

49. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The cooling contactor coil
Compressor
The contactor coil
208-volt/240-volt single-phase power supply

50. What must be done to the system when a condensing unit is precharged for 25' of refrigerant line and uses 32' of refrigerant line...
Capillary action
Refrigerant must be added to the system
A compression fitting
Evaporator