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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. Quick-connect fittings are commonly used on...
Insulated
Precharged refrigeration linesets
The suction line must be pitched toward the condensing unit
Evaporator

2. 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
Must be located in a conspicuous place to serve as an alarm
Compressor
This will prevent settling of the ground - which can cause refrigerant line damage

3. A secondary drain line...
The contactor coil
The accumulator
The contactor coil
Must be located in a conspicuous place to serve as an alarm

4. A room thermostat should be mounted...
Compressor
Condenser
Near a return-air grill
Condenser

5. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Capillary action
Refrigerant must be added to the system
Evaporator
Evaporator

6. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
Evaporator
Metering device
The suction line must be pitched toward the condensing unit
The temperature increases

7. What is the purpose for insulating a suction line...
Refrigerant must be added to the system
The temperature increases
To prevent condensation from forming
The lines must be covered by PVC to prevent contact with the masonry material

8. What is the 'are' terminal used for on the thermostat...
The power from the transformer
The cooling contactor coil
Check for tight connections at electrical terminals
Refrigerant must be added to the system

9. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
Metering device
Condenser
The contactor coil
A compression fitting

10. Before energizing a newly installed system - what test should always be done...
Refrigerant must be added to the system
Compressor
The contactor coil
Check for tight connections at electrical terminals

11. Residential split-system outdoor condensing units are commonly wired with a...
The cooling contactor coil
208-volt/240-volt single-phase power supply
Evaporator
Insulated

12. Residential split-system outdoor condensing units are commonly wired with a...
Near a return-air grill
208-volt/240-volt single-phase power supply
Have a minimum perimeter of 3' larger than the unit being served
Metering device (restrictor)

13. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The accumulator
The contactor coil
Near a return-air grill
Evaporator

14. Which part of the system stores refrigerant until it is needed in the evaporator...
The lines must be covered by PVC to prevent contact with the masonry material
The receiver
The contactor coil
The temperature increases

15. A room thermostat should be mounted...
Metering device
This will prevent settling of the ground - which can cause refrigerant line damage
This will prevent settling of the ground - which can cause refrigerant line damage
Near a return-air grill

16. What is the 'G' terminal used for on the thermostat...
A TXV
The contactor coil
The blower relay coil
The coil is precharged with nitrogen

17. What type of metering device is used on a 12 SEER split air conditioning system...
The receiver
Near a return-air grill
The lines must be covered by PVC to prevent contact with the masonry material
A TXV

18. If ductwork is located in an attic or crawl space - it must be...
Condenser
Insulated
Must be coiled horizontally and the vapor must flow from top to bottom
The heating control circuit

19. What type of metering device is used on a 12 SEER split air conditioning system...
A compression fitting
A TXV
The cooling contactor coil
Refrigerant must be added to the system

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

21. A secondary drain line...
The temperature increases
Must be located in a conspicuous place to serve as an alarm
The coil is precharged with nitrogen
The heating control circuit

22. Quick-connect fittings are commonly used on...
Condenser
Precharged refrigeration linesets
The power from the transformer
Refrigerant must be added to the system

23. What is the secondary voltage on a step-down control transformer for a residential furnace...
The lines must be covered by PVC to prevent contact with the masonry material
The power from the transformer
To prevent condensation from forming
24 volts

24. What is the 'Y' terminal used for on the thermostat...
Metering device
The cooling contactor coil
The temperature increases
Evaporator

25. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Have a minimum perimeter of 3' larger than the unit being served
Insulated
Near a return-air grill
Compressor

26. In a sealed system - as the pressure increases...
The temperature increases
The coil is precharged with nitrogen
The suction line must be pitched toward the condensing unit
Must be coiled horizontally and the vapor must flow from top to bottom

27. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
The blower relay coil
Must be located in a conspicuous place to serve as an alarm
Compressor
Condenser

28. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
The temperature increases
Compressor
The cooling contactor coil
The power from the transformer

29. If ductwork is located in an attic or crawl space - it must be...
The contactor coil
Have a minimum perimeter of 3' larger than the unit being served
Insulated
Must be coiled horizontally and the vapor must flow from top to bottom

30. Why is it recommended to add a gravel fill under the pad of a condensing unit...
Capillary action
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
The blower relay coil

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

32. What is the 'W' terminal used for on the thermostat...
The heating control circuit
Insulated
This will prevent settling of the ground - which can cause refrigerant line damage
Metering device

33. A split-system air conditioning unit has...
The contactor coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Compressor
This will prevent settling of the ground - which can cause refrigerant line damage

34. An auxiliary drain pan must...

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35. Which part of the system prevents liquid from entering the compressor...
The suction line must be pitched toward the condensing unit
The accumulator
Evaporator
Refrigerant must be added to the system

36. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Check for tight connections at electrical terminals
Compressor
The coil is precharged with nitrogen
Condenser

37. 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)
Near a return-air grill
Condenser
The cooling contactor coil

38. 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 receiver
To prevent condensation from forming
Refrigerant must be added to the system
Metering device

39. What type of fitting uses an O-ring to help seal its joint...
Must be coiled horizontally and the vapor must flow from top to bottom
24 volts
The coil is precharged with nitrogen
A compression fitting

40. What is the secondary voltage on a step-down control transformer for a residential furnace...
24 volts
The accumulator
Compressor
Insulated

41. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Capillary action
Metering device (restrictor)
Must be coiled horizontally and the vapor must flow from top to bottom
24 volts

42. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Condenser
The receiver
Capillary action
Evaporator

43. What is the 'G' terminal used for on the thermostat...
The temperature increases
Must be located in a conspicuous place to serve as an alarm
Must be located in a conspicuous place to serve as an alarm
The blower relay coil

44. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Metering device (restrictor)
Precharged refrigeration linesets
Compressor
Condenser

45. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Condenser
Metering device (restrictor)
Must be coiled horizontally and the vapor must flow from top to bottom

46. What is the 'Y' terminal used for on the thermostat...
Check for tight connections at electrical terminals
The cooling contactor coil
Refrigerant must be added to the system
The suction line must be pitched toward the condensing unit

47. 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 lines must be covered by PVC to prevent contact with the masonry material
Condenser
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

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

49. A split-system air conditioning unit has...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
A TXV
This will prevent settling of the ground - which can cause refrigerant line damage
Compressor

50. 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
Evaporator
Metering device (restrictor)