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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. Before energizing a newly installed system - what test should always be done...
Precharged refrigeration linesets
Check for tight connections at electrical terminals
Metering device (restrictor)
To prevent condensation from forming

2. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
Condenser
Precharged refrigeration linesets
Must be coiled horizontally and the vapor must flow from top to bottom
This will prevent settling of the ground - which can cause refrigerant line damage

3. Which part of the system stores refrigerant until it is needed in the evaporator...
The power from the transformer
Compressor
The receiver
Compressor

4. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Compressor
The power from the transformer
To prevent condensation from forming
A compression fitting

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

6. To ensure proper oil return to the compressor - when installing a refrigeration line set...
Must be located in a conspicuous place to serve as an alarm
The heating control circuit
The suction line must be pitched toward the condensing unit
Insulated

7. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
To prevent condensation from forming
Condenser
The lines must be covered by PVC to prevent contact with the masonry material
The heating control circuit

8. 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
The lines must be covered by PVC to prevent contact with the masonry material
Compressor
The heating control circuit

9. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
Have a minimum perimeter of 3' larger than the unit being served
Metering device
The accumulator
The contactor coil

10. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
208-volt/240-volt single-phase power supply
Must be coiled horizontally and the vapor must flow from top to bottom
Metering device (restrictor)
A compression fitting

11. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Condenser
Capillary action
Check for tight connections at electrical terminals
Compressor

12. When installing a refrigeration line set through a masonry wall
Condenser
The heating control circuit
The lines must be covered by PVC to prevent contact with the masonry material
Must be located in a conspicuous place to serve as an alarm

13. 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
A TXV

14. What is the 'W' terminal used for on the thermostat...
A compression fitting
Metering device
Compressor
The heating control circuit

15. Residential split-system outdoor condensing units are commonly wired with a...
Evaporator
A compression fitting
A compression fitting
208-volt/240-volt single-phase power supply

16. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
Condenser
Metering device (restrictor)
The lines must be covered by PVC to prevent contact with the masonry material
The coil is precharged with nitrogen

17. Which part of the system prevents liquid from entering the compressor...
The temperature increases
The accumulator
Have a minimum perimeter of 3' larger than the unit being served
The power from the transformer

18. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
The cooling contactor coil
The temperature increases
Insulated
Compressor

19. 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
A TXV
The accumulator
Insulated

20. What must be done to the system when a condensing unit is precharged for 25' of refrigerant line and uses 32' of refrigerant line...
208-volt/240-volt single-phase power supply
The power from the transformer
Refrigerant must be added to the system
The lines must be covered by PVC to prevent contact with the masonry material

21. Residential split-system outdoor condensing units are commonly wired with a...
208-volt/240-volt single-phase power supply
Evaporator
Capillary action
Must be coiled horizontally and the vapor must flow from top to bottom

22. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
Have a minimum perimeter of 3' larger than the unit being served
Metering device (restrictor)
Condenser
Near a return-air grill

23. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Capillary action
The contactor coil
This will prevent settling of the ground - which can cause refrigerant line damage
Compressor

24. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
Condenser
Refrigerant must be added to the system
The coil is precharged with nitrogen
To prevent condensation from forming

25. If ductwork is located in an attic or crawl space - it must be...
Must be coiled horizontally and the vapor must flow from top to bottom
Compressor
Insulated
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

26. An auxiliary drain pan must...

27. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
The temperature increases
The power from the transformer
Compressor
Metering device (restrictor)

28. In a sealed system - as the pressure increases...
Must be coiled horizontally and the vapor must flow from top to bottom
The suction line must be pitched toward the condensing unit
The lines must be covered by PVC to prevent contact with the masonry material
The temperature increases

29. Before energizing a newly installed system - what test should always be done...
Must be located in a conspicuous place to serve as an alarm
Metering device (restrictor)
Check for tight connections at electrical terminals
Capillary action

30. A secondary drain line...
Must be located in a conspicuous place to serve as an alarm
Must be coiled horizontally and the vapor must flow from top to bottom
The contactor coil
The coil is precharged with nitrogen

31. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
To prevent condensation from forming
A compression fitting
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Condenser

32. What is the secondary voltage on a step-down control transformer for a residential furnace...
A TXV
The receiver
Precharged refrigeration linesets
24 volts

33. Quick-connect fittings are commonly used on...
Refrigerant must be added to the system
The cooling contactor coil
This will prevent settling of the ground - which can cause refrigerant line damage
Precharged refrigeration linesets

34. In a sealed system - as the pressure increases...
The temperature increases
24 volts
A TXV
The coil is precharged with nitrogen

35. What is the purpose for insulating a suction line...
Have a minimum perimeter of 3' larger than the unit being served
Near a return-air grill
Capillary action
To prevent condensation from forming

36. What type of fitting uses an O-ring to help seal its joint...
Condenser
24 volts
24 volts
A compression fitting

37. Quick-connect fittings are commonly used on...
Precharged refrigeration linesets
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 heating control circuit

38. An auxiliary drain pan must...

39. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The contactor coil
The blower relay coil
Have a minimum perimeter of 3' larger than the unit being served
Evaporator

40. A room thermostat should be mounted...
Compressor
To prevent condensation from forming
The lines must be covered by PVC to prevent contact with the masonry material
Near a return-air grill

41. 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
Refrigerant must be added to the system
The suction line must be pitched toward the condensing unit
Evaporator

42. To ensure proper oil return to the compressor - when installing a refrigeration line set...
Evaporator
The suction line must be pitched toward the condensing unit
A compression fitting
Condenser

43. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Condenser
Evaporator
Must be coiled horizontally and the vapor must flow from top to bottom
Metering device (restrictor)

44. What is the purpose for insulating a suction line...
Check for tight connections at electrical terminals
Evaporator
Condenser
To prevent condensation from forming

45. When installing a refrigeration line set through a masonry wall
Evaporator
The temperature increases
Metering device
The lines must be covered by PVC to prevent contact with the masonry material

46. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Condenser
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The heating control circuit
A TXV

47. What is the 'G' terminal used for on the thermostat...
Insulated
The blower relay coil
The accumulator
The heating control circuit

48. A split-system air conditioning unit has...
A compression fitting
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
Compressor

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

50. What is the 'are' terminal used for on the thermostat...
Compressor
The power from the transformer
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Metering device (restrictor)