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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. To ensure proper oil return to the compressor - when installing a refrigeration line set...
The suction line must be pitched toward the condensing unit
The blower relay coil
208-volt/240-volt single-phase power supply
The temperature increases

2. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
The lines must be covered by PVC to prevent contact with the masonry material
Capillary action
The coil is precharged with nitrogen
Compressor

3. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Compressor
The heating control circuit
The contactor coil
The receiver

4. What is the 'Y' terminal used for on the thermostat...
208-volt/240-volt single-phase power supply
Insulated
The cooling contactor coil
A compression fitting

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

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

7. Why is it recommended to add a gravel fill under the pad of a condensing unit...
Compressor
The blower relay coil
This will prevent settling of the ground - which can cause refrigerant line damage
Insulated

8. What type of fitting uses an O-ring to help seal its joint...
The contactor coil
Capillary action
Precharged refrigeration linesets
A compression fitting

9. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
The cooling contactor coil
Condenser
The receiver
Insulated

10. What must be done to the system when a condensing unit is precharged for 25' of refrigerant line and uses 32' of refrigerant line...
Compressor
The cooling contactor coil
A TXV
Refrigerant must be added to the system

11. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
The accumulator
Compressor
The accumulator
The blower relay coil

12. What is the secondary voltage on a step-down control transformer for a residential furnace...
208-volt/240-volt single-phase power supply
The coil is precharged with nitrogen
Evaporator
24 volts

13. What is the 'W' terminal used for on the thermostat...
The blower relay coil
Compressor
Condenser
The heating control circuit

14. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Check for tight connections at electrical terminals
Have a minimum perimeter of 3' larger than the unit being served
Metering device (restrictor)
The temperature increases

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

16. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
The receiver
The coil is precharged with nitrogen
Compressor
The contactor coil

17. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
Must be located in a conspicuous place to serve as an alarm
Metering device
The receiver
Evaporator

18. What is the 'G' terminal used for on the thermostat...
Have a minimum perimeter of 3' larger than the unit being served
Condenser
Refrigerant must be added to the system
The blower relay coil

19. Which part of the system stores refrigerant until it is needed in the evaporator...
The cooling contactor coil
The receiver
The power from the transformer
Metering device (restrictor)

20. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
This will prevent settling of the ground - which can cause refrigerant line damage
Condenser
Must be coiled horizontally and the vapor must flow from top to bottom
The lines must be covered by PVC to prevent contact with the masonry material

21. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Compressor
A TXV
Capillary action
Evaporator

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

23. Which part of the system stores refrigerant until it is needed in the evaporator...
The contactor coil
The receiver
The cooling contactor coil
Compressor

24. Quick-connect fittings are commonly used on...
Condenser
Metering device (restrictor)
Evaporator
Precharged refrigeration linesets

25. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
Compressor
The cooling contactor coil
Precharged refrigeration linesets
The contactor coil

26. In a sealed system - as the pressure increases...
The suction line must be pitched toward the condensing unit
The contactor coil
The temperature increases
Compressor

27. What is the 'are' terminal used for on the thermostat...
Must be located in a conspicuous place to serve as an alarm
24 volts
Compressor
The power from the transformer

28. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Evaporator
The blower relay coil
A TXV
The power from the transformer

29. What is the purpose for insulating a suction line...
The accumulator
Must be located in a conspicuous place to serve as an alarm
Capillary action
To prevent condensation from forming

30. What is the 'W' terminal used for on the thermostat...
The heating control circuit
24 volts
Condenser
This will prevent settling of the ground - which can cause refrigerant line damage

31. Before energizing a newly installed system - what test should always be done...
Evaporator
Evaporator
Check for tight connections at electrical terminals
Have a minimum perimeter of 3' larger than the unit being served

32. Why is it recommended to add a gravel fill under the pad of a condensing unit...
Have a minimum perimeter of 3' larger than the unit being served
This will prevent settling of the ground - which can cause refrigerant line damage
Metering device
Evaporator

33. 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 cooling contactor coil
Compressor
Refrigerant must be added to the system
Insulated

34. Quick-connect fittings are commonly used on...
The accumulator
Precharged refrigeration linesets
The contactor coil
Compressor

35. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
The suction line must be pitched toward the condensing unit
The heating control circuit
Precharged refrigeration linesets
The coil is precharged with nitrogen

36. To ensure proper oil return to the compressor - when installing a refrigeration line set...
The suction line must be pitched toward the condensing unit
Evaporator
The cooling contactor coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

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

38. 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
The contactor coil
The suction line must be pitched toward the condensing unit
Insulated

39. A room thermostat should be mounted...
Near a return-air grill
The accumulator
A TXV
A compression fitting

40. 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
208-volt/240-volt single-phase power supply

41. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
To prevent condensation from forming
The blower relay coil
Metering device
Evaporator

42. If ductwork is located in an attic or crawl space - it must be...
The heating control circuit
Evaporator
Near a return-air grill
Insulated

43. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Have a minimum perimeter of 3' larger than the unit being served
Condenser
Near a return-air grill
Must be located in a conspicuous place to serve as an alarm

44. Residential split-system outdoor condensing units are commonly wired with a...
208-volt/240-volt single-phase power supply
Capillary action
A compression fitting
The coil is precharged with nitrogen

45. What is the secondary voltage on a step-down control transformer for a residential furnace...
24 volts
Have a minimum perimeter of 3' larger than the unit being served
The blower relay coil
The lines must be covered by PVC to prevent contact with the masonry material

46. Before energizing a newly installed system - what test should always be done...
Check for tight connections at electrical terminals
To prevent condensation from forming
The receiver
Condenser

47. What is the 'are' terminal used for on the thermostat...
Have a minimum perimeter of 3' larger than the unit being served
The power from the transformer
Must be located in a conspicuous place to serve as an alarm
The contactor coil

48. An auxiliary drain pan must...

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49. Residential split-system outdoor condensing units are commonly wired with a...
Refrigerant must be added to the system
208-volt/240-volt single-phase power supply
The power from the transformer
Must be located in a conspicuous place to serve as an alarm

50. A split-system air conditioning unit has...
Evaporator
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
This will prevent settling of the ground - which can cause refrigerant line damage