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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 type of metering device is used on a 12 SEER split air conditioning system...
Must be coiled horizontally and the vapor must flow from top to bottom
Compressor
Compressor
A TXV

2. Quick-connect fittings are commonly used on...
The receiver
Precharged refrigeration linesets
Condenser
Compressor

3. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Metering device (restrictor)
The receiver
Compressor
A compression fitting

4. To ensure proper oil return to the compressor - when installing a refrigeration line set...
The heating control circuit
The suction line must be pitched toward the condensing unit
Condenser
Metering device

5. When installing a refrigeration line set through a masonry wall
The lines must be covered by PVC to prevent contact with the masonry material
The coil is precharged with nitrogen
Compressor
Near a return-air grill

6. A secondary drain line...
Evaporator
The heating control circuit
Condenser
Must be located in a conspicuous place to serve as an alarm

7. Which part of the system stores refrigerant until it is needed in the evaporator...
Must be coiled horizontally and the vapor must flow from top to bottom
Refrigerant must be added to the system
To prevent condensation from forming
The receiver

8. A secondary drain line...
This will prevent settling of the ground - which can cause refrigerant line damage
Must be located in a conspicuous place to serve as an alarm
The suction line must be pitched toward the condensing unit
Refrigerant must be added to the system

9. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Condenser
Compressor
Precharged refrigeration linesets
The heating control circuit

10. An auxiliary drain pan must...

11. Which part of the system prevents liquid from entering the compressor...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The suction line must be pitched toward the condensing unit
Evaporator
The accumulator

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

13. What is the 'Y' terminal used for on the thermostat...
The temperature increases
Must be located in a conspicuous place to serve as an alarm
The cooling contactor coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

14. What is the purpose for insulating a suction line...
Must be coiled horizontally and the vapor must flow from top to bottom
To prevent condensation from forming
The receiver
This will prevent settling of the ground - which can cause refrigerant line damage

15. What is the 'W' terminal used for on the thermostat...
The heating control circuit
A compression fitting
The suction line must be pitched toward the condensing unit
Near a return-air grill

16. If ductwork is located in an attic or crawl space - it must be...
To prevent condensation from forming
208-volt/240-volt single-phase power supply
Insulated
Capillary action

17. When installing a refrigeration line set through a masonry wall
The heating control circuit
The receiver
Compressor
The lines must be covered by PVC to prevent contact with the masonry material

18. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Capillary action
Condenser
Evaporator
The temperature increases

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

20. What type of fitting uses an O-ring to help seal its joint...
A compression fitting
Refrigerant must be added to the system
Near a return-air grill
The coil is precharged with nitrogen

21. 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 power from the transformer
Have a minimum perimeter of 3' larger than the unit being served
Capillary action

22. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
Precharged refrigeration linesets
Condenser
The coil is precharged with nitrogen
The cooling contactor coil

23. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Capillary action
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
This will prevent settling of the ground - which can cause refrigerant line damage
Compressor

24. Before energizing a newly installed system - what test should always be done...
Insulated
Check for tight connections at electrical terminals
This will prevent settling of the ground - which can cause refrigerant line damage
The suction line must be pitched toward the condensing unit

25. Which part of the system stores refrigerant until it is needed in the evaporator...
The receiver
Near a return-air grill
To prevent condensation from forming
Evaporator

26. An auxiliary drain pan must...

27. 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
24 volts
Compressor

28. What is the 'are' terminal used for on the thermostat...
The coil is precharged with nitrogen
The power from the transformer
Must be coiled horizontally and the vapor must flow from top to bottom
The heating control circuit

29. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Capillary action
Condenser
To prevent condensation from forming
Metering device (restrictor)

30. 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
Refrigerant must be added to the system
Must be located in a conspicuous place to serve as an alarm
Near a return-air grill

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

32. What is the 'G' terminal used for on the thermostat...
To prevent condensation from forming
To prevent condensation from forming
The lines must be covered by PVC to prevent contact with the masonry material
The blower relay coil

33. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
The coil is precharged with nitrogen
24 volts
Evaporator
Must be located in a conspicuous place to serve as an alarm

34. What is the secondary voltage on a step-down control transformer for a residential furnace...
24 volts
The suction line must be pitched toward the condensing unit
The receiver
Have a minimum perimeter of 3' larger than the unit being served

35. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Near a return-air grill
Evaporator
24 volts
The contactor coil

36. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
Condenser
Compressor
Metering device
Compressor

37. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
The cooling contactor coil
The contactor coil
24 volts
Compressor

38. To ensure proper oil return to the compressor - when installing a refrigeration line set...
Near a return-air grill
The blower relay coil
The suction line must be pitched toward the condensing unit
The contactor coil

39. In a sealed system - as the pressure increases...
The temperature increases
Refrigerant must be added to the system
Near a return-air grill
The receiver

40. A room thermostat should be mounted...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Capillary action
Near a return-air grill
Insulated

41. A room thermostat should be mounted...
Check for tight connections at electrical terminals
Condenser
Near a return-air grill
The coil is precharged with nitrogen

42. 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
The cooling contactor coil
Evaporator

43. What type of fitting uses an O-ring to help seal its joint...
A compression fitting
The heating control circuit
The lines must be covered by PVC to prevent contact with the masonry material
The contactor coil

44. Which part of the system prevents liquid from entering the compressor...
The accumulator
Near a return-air grill
Evaporator
Check for tight connections at electrical terminals

45. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
Compressor
Condenser
The suction line must be pitched toward the condensing unit
208-volt/240-volt single-phase power supply

46. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Capillary action
Evaporator
208-volt/240-volt single-phase power supply
Condenser

47. What must be done to the system when a condensing unit is precharged for 25' of refrigerant line and uses 32' of refrigerant line...
Check for tight connections at electrical terminals
This will prevent settling of the ground - which can cause refrigerant line damage
Refrigerant must be added to the system
The accumulator

48. What is the 'are' terminal used for on the thermostat...
Evaporator
The power from the transformer
Metering device (restrictor)
Check for tight connections at electrical terminals

49. A split-system air conditioning unit has...
Condenser
A TXV
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The power from the transformer

50. Quick-connect fittings are commonly used on...
Metering device (restrictor)
Precharged refrigeration linesets
The power from the transformer
Check for tight connections at electrical terminals