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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 is the purpose for insulating a suction line...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Near a return-air grill
To prevent condensation from forming
Must be located in a conspicuous place to serve as an alarm

2. Quick-connect fittings are commonly used on...
Check for tight connections at electrical terminals
24 volts
Near a return-air grill
Precharged refrigeration linesets

3. 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
To prevent condensation from forming
Compressor
Evaporator

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

5. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
Refrigerant must be added to the system
Compressor
A compression fitting
The contactor coil

6. 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
The contactor coil
Condenser

7. If ductwork is located in an attic or crawl space - it must be...
Condenser
Compressor
The suction line must be pitched toward the condensing unit
Insulated

8. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
Refrigerant must be added to the system
Precharged refrigeration linesets
The contactor coil
Evaporator

9. Quick-connect fittings are commonly used on...
The contactor coil
The coil is precharged with nitrogen
Precharged refrigeration linesets
Evaporator

10. Which part of the system stores refrigerant until it is needed in the evaporator...
The power from the transformer
Must be located in a conspicuous place to serve as an alarm
Compressor
The receiver

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

12. Which part of the system stores refrigerant until it is needed in the evaporator...
Check for tight connections at electrical terminals
Evaporator
The receiver
This will prevent settling of the ground - which can cause refrigerant line damage

13. Which part of the system prevents liquid from entering the compressor...
The accumulator
Must be located in a conspicuous place to serve as an alarm
This will prevent settling of the ground - which can cause refrigerant line damage
The lines must be covered by PVC to prevent contact with the masonry material

14. What is the 'are' terminal used for on the thermostat...
Capillary action
The power from the transformer
208-volt/240-volt single-phase power supply
24 volts

15. Why is it recommended to add a gravel fill under the pad of a condensing unit...
To prevent condensation from forming
Metering device (restrictor)
Condenser
This will prevent settling of the ground - which can cause refrigerant line damage

16. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Evaporator
Refrigerant must be added to the system
Condenser
The coil is precharged with nitrogen

17. What type of metering device is used on a 12 SEER split air conditioning system...
Compressor
A TXV
Evaporator
Insulated

18. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
Evaporator
A TXV
Condenser
A TXV

19. A room thermostat should be mounted...
Check for tight connections at electrical terminals
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Compressor
Near a return-air grill

20. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Precharged refrigeration linesets
Precharged refrigeration linesets
The cooling contactor coil
Compressor

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

22. What type of fitting uses an O-ring to help seal its joint...
A compression fitting
The suction line must be pitched toward the condensing unit
Metering device (restrictor)
Compressor

23. When installing a refrigeration line set through a masonry wall
Compressor
The lines must be covered by PVC to prevent contact with the masonry material
Must be coiled horizontally and the vapor must flow from top to bottom
The power from the transformer

24. What is the 'Y' terminal used for on the thermostat...
A compression fitting
The cooling contactor coil
Evaporator
The accumulator

25. What is the 'G' terminal used for on the thermostat...
A compression fitting
Evaporator
The blower relay coil
The contactor coil

26. What must be done to the system when a condensing unit is precharged for 25' of refrigerant line and uses 32' of refrigerant line...
A TXV
Refrigerant must be added to the system
Capillary action
24 volts

27. What type of fitting uses an O-ring to help seal its joint...
The contactor coil
Compressor
A compression fitting
To prevent condensation from forming

28. A room thermostat should be mounted...
Condenser
Near a return-air grill
This will prevent settling of the ground - which can cause refrigerant line damage
Have a minimum perimeter of 3' larger than the unit being served

29. An auxiliary drain pan must...

30. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
Refrigerant must be added to the system
The coil is precharged with nitrogen
Compressor
Compressor

31. A secondary drain line...
Near a return-air grill
Must be located in a conspicuous place to serve as an alarm
24 volts
Near a return-air grill

32. 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
Condenser
Check for tight connections at electrical terminals
Condenser

33. What is the 'Y' terminal used for on the thermostat...
The cooling contactor coil
Evaporator
The receiver
The temperature increases

34. A split-system air conditioning unit has...
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
To prevent condensation from forming
The contactor coil

35. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
A TXV
Compressor
Have a minimum perimeter of 3' larger than the unit being served
Condenser

36. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
The blower relay coil
The suction line must be pitched toward the condensing unit
The receiver
Metering device (restrictor)

37. An auxiliary drain pan must...

38. What is the secondary voltage on a step-down control transformer for a residential furnace...
Metering device (restrictor)
208-volt/240-volt single-phase power supply
24 volts
The power from the transformer

39. Which part of the system prevents liquid from entering the compressor...
The cooling contactor coil
The lines must be covered by PVC to prevent contact with the masonry material
The accumulator
Check for tight connections at electrical terminals

40. Residential split-system outdoor condensing units are commonly wired with a...
208-volt/240-volt single-phase power supply
This will prevent settling of the ground - which can cause refrigerant line damage
Check for tight connections at electrical terminals
The cooling contactor coil

41. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
The contactor coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Metering device
The lines must be covered by PVC to prevent contact with the masonry material

42. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
The power from the transformer
The receiver
Capillary action
The power from the transformer

43. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Condenser
The coil is precharged with nitrogen
The power from the transformer
208-volt/240-volt single-phase power supply

44. A secondary drain line...
Metering device (restrictor)
The cooling contactor coil
Must be located in a conspicuous place to serve as an alarm
Precharged refrigeration linesets

45. A split-system air conditioning unit has...
A TXV
Precharged refrigeration linesets
The contactor coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

46. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
The lines must be covered by PVC to prevent contact with the masonry material
Capillary action
Metering device (restrictor)
The power from the transformer

47. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
The blower relay coil
A TXV
Metering device (restrictor)
Metering device

48. Residential split-system outdoor condensing units are commonly wired with a...
The contactor coil
The blower relay coil
208-volt/240-volt single-phase power supply
The contactor coil

49. Why is it recommended to add a gravel fill under the pad of a condensing unit...
To prevent condensation from forming
This will prevent settling of the ground - which can cause refrigerant line damage
Condenser
The power from the transformer

50. 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
This will prevent settling of the ground - which can cause refrigerant line damage
The cooling contactor coil