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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. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
The contactor coil
The lines must be covered by PVC to prevent contact with the masonry material
Metering device (restrictor)
The power from the transformer

2. What is the purpose for insulating a suction line...
Compressor
A TXV
Compressor
To prevent condensation from forming

3. What is the 'are' terminal used for on the thermostat...
Condenser
The power from the transformer
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Evaporator

4. What type of fitting uses an O-ring to help seal its joint...
A compression fitting
A TXV
A TXV
Capillary action

5. Which part of the system prevents liquid from entering the compressor...
208-volt/240-volt single-phase power supply
The accumulator
Check for tight connections at electrical terminals
Compressor

6. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
The blower relay coil
Evaporator
Metering device (restrictor)
Condenser

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

8. An auxiliary drain pan must...

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9. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
Near a return-air grill
Must be coiled horizontally and the vapor must flow from top to bottom
The contactor coil
Condenser

10. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The receiver
Compressor
Compressor
The contactor coil

11. If ductwork is located in an attic or crawl space - it must be...
Insulated
Compressor
The lines must be covered by PVC to prevent contact with the masonry material
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

12. Residential split-system outdoor condensing units are commonly wired with a...
The receiver
24 volts
Must be located in a conspicuous place to serve as an alarm
208-volt/240-volt single-phase power supply

13. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Compressor
Evaporator
Near a return-air grill
Have a minimum perimeter of 3' larger than the unit being served

14. A secondary drain line...
Must be located in a conspicuous place to serve as an alarm
208-volt/240-volt single-phase power supply
The suction line must be pitched toward the condensing unit
The accumulator

15. Which part of the system prevents liquid from entering the compressor...
The accumulator
Check for tight connections at electrical terminals
The lines must be covered by PVC to prevent contact with the masonry material
This will prevent settling of the ground - which can cause refrigerant line damage

16. A split-system air conditioning unit has...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Have a minimum perimeter of 3' larger than the unit being served
The cooling contactor coil
The blower relay coil

17. Which part of the system stores refrigerant until it is needed in the evaporator...
Have a minimum perimeter of 3' larger than the unit being served
The receiver
Capillary action
The cooling contactor coil

18. What type of metering device is used on a 12 SEER split air conditioning system...
The temperature increases
A TXV
Metering device
The power from the transformer

19. 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
This will prevent settling of the ground - which can cause refrigerant line damage
Evaporator
Compressor

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

21. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Metering device (restrictor)
Check for tight connections at electrical terminals
Evaporator
Condenser

22. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
24 volts
Evaporator
This will prevent settling of the ground - which can cause refrigerant line damage
Compressor

23. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
Evaporator
Must be coiled horizontally and the vapor must flow from top to bottom
Refrigerant must be added to the system
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

24. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Evaporator
Compressor
Capillary action
The cooling contactor coil

25. What is the 'G' terminal used for on the thermostat...
208-volt/240-volt single-phase power supply
Near a return-air grill
The blower relay coil
Evaporator

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

27. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
Precharged refrigeration linesets
The blower relay coil
The lines must be covered by PVC to prevent contact with the masonry material
Metering device

28. What is the purpose for insulating a suction line...
Precharged refrigeration linesets
Compressor
To prevent condensation from forming
The heating control circuit

29. In a sealed system - as the pressure increases...
The temperature increases
The power from the transformer
24 volts
Capillary action

30. 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 accumulator
The temperature increases
Must be coiled horizontally and the vapor must flow from top to bottom

31. What is the 'Y' terminal used for on the thermostat...
Metering device
The cooling contactor coil
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

32. What is the secondary voltage on a step-down control transformer for a residential furnace...
This will prevent settling of the ground - which can cause refrigerant line damage
24 volts
Must be coiled horizontally and the vapor must flow from top to bottom
The coil is precharged with nitrogen

33. If ductwork is located in an attic or crawl space - it must be...
A TXV
Insulated
Precharged refrigeration linesets
Metering device (restrictor)

34. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Must be coiled horizontally and the vapor must flow from top to bottom
Compressor
Insulated
Condenser

35. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Refrigerant must be added to the system
Check for tight connections at electrical terminals
Compressor
Capillary action

36. What is the 'G' terminal used for on the thermostat...
Capillary action
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The blower relay coil
To prevent condensation from forming

37. Before energizing a newly installed system - what test should always be done...
Check for tight connections at electrical terminals
The accumulator
The receiver
Refrigerant must be added to the system

38. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
The accumulator
Check for tight connections at electrical terminals
Evaporator
The coil is precharged with nitrogen

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

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

41. A secondary drain line...
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
Condenser
Have a minimum perimeter of 3' larger than the unit being served

42. Quick-connect fittings are commonly used on...
Compressor
Precharged refrigeration linesets
Metering device (restrictor)
The temperature increases

43. A room thermostat should be mounted...
Near a return-air grill
Refrigerant must be added to the system
Precharged refrigeration linesets
The blower relay coil

44. 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 compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The power from the transformer
Check for tight connections at electrical terminals
Refrigerant must be added to the system

45. What type of fitting uses an O-ring to help seal its joint...
Evaporator
Near a return-air grill
A compression fitting
To prevent condensation from forming

46. What is the 'are' terminal used for on the thermostat...
A TXV
The power from the transformer
Near a return-air grill
Compressor

47. To ensure proper oil return to the compressor - when installing a refrigeration line set...
Evaporator
A TXV
The temperature increases
The suction line must be pitched toward the condensing unit

48. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
The power from the transformer
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The coil is precharged with nitrogen
Condenser

49. What is the 'Y' terminal used for on the thermostat...
208-volt/240-volt single-phase power supply
The cooling contactor coil
The coil is precharged with nitrogen
Evaporator

50. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
Condenser
Must be coiled horizontally and the vapor must flow from top to bottom
A compression fitting
Precharged refrigeration linesets