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

2. Why is it recommended to add a gravel fill under the pad of a condensing unit...
Refrigerant must be added to the system
Insulated
This will prevent settling of the ground - which can cause refrigerant line damage
Check for tight connections at electrical terminals

3. 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
Metering device (restrictor)
Metering device
The heating control circuit

4. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The heating control circuit
Must be located in a conspicuous place to serve as an alarm
The suction line must be pitched toward the condensing unit
The contactor coil

5. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
A TXV
The receiver
Must be coiled horizontally and the vapor must flow from top to bottom

6. What is the secondary voltage on a step-down control transformer for a residential furnace...
24 volts
Must be located in a conspicuous place to serve as an alarm
Precharged refrigeration linesets
Compressor

7. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Evaporator
Must be coiled horizontally and the vapor must flow from top to bottom
Condenser
This will prevent settling of the ground - which can cause refrigerant line damage

8. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Check for tight connections at electrical terminals
The accumulator
Refrigerant must be added to the system
Metering device (restrictor)

9. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
A compression fitting
The contactor coil
Compressor
Evaporator

10. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Capillary action
The receiver
Metering device
The contactor coil

11. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
The cooling contactor coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Metering device (restrictor)
Evaporator

12. Before energizing a newly installed system - what test should always be done...
Capillary action
Check for tight connections at electrical terminals
The heating control circuit
The coil is precharged with nitrogen

13. If ductwork is located in an attic or crawl space - it must be...
208-volt/240-volt single-phase power supply
Insulated
A compression fitting
The accumulator

14. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
24 volts
The temperature increases
Condenser
The receiver

15. Which part of the system prevents liquid from entering the compressor...
The receiver
The cooling contactor coil
The accumulator
Check for tight connections at electrical terminals

16. In a sealed system - as the pressure increases...
Refrigerant must be added to the system
Refrigerant must be added to the system
The temperature increases
The receiver

17. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Condenser
Precharged refrigeration linesets
Compressor
Near a return-air grill

18. Why is it recommended to add a gravel fill under the pad of a condensing unit...
Compressor
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 lines must be covered by PVC to prevent contact with the masonry material

19. When installing a refrigeration line set through a masonry wall
24 volts
Near a return-air grill
The lines must be covered by PVC to prevent contact with the masonry material
The suction line must be pitched toward the condensing unit

20. What is the 'Y' terminal used for on the thermostat...
Capillary action
Metering device
The cooling contactor coil
Precharged refrigeration linesets

21. What is the purpose for insulating a suction line...
To prevent condensation from forming
Must be coiled horizontally and the vapor must flow from top to bottom
Have a minimum perimeter of 3' larger than the unit being served
The accumulator

22. What is the secondary voltage on a step-down control transformer for a residential furnace...
Capillary action
The blower relay coil
Check for tight connections at electrical terminals
24 volts

23. What type of metering device is used on a 12 SEER split air conditioning system...
A TXV
The lines must be covered by PVC to prevent contact with the masonry material
The coil is precharged with nitrogen
Must be coiled horizontally and the vapor must flow from top to bottom

24. An auxiliary drain pan must...

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25. A secondary drain line...
208-volt/240-volt single-phase power supply
Condenser
The power from the transformer
Must be located in a conspicuous place to serve as an alarm

26. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
The coil is precharged with nitrogen
The power from the transformer
Capillary action
Refrigerant must be added to the system

27. What is the 'Y' terminal used for on the thermostat...
The cooling contactor coil
Compressor
Insulated
Check for tight connections at electrical terminals

28. Before energizing a newly installed system - what test should always be done...
Capillary action
Check for tight connections at electrical terminals
Near a return-air grill
The lines must be covered by PVC to prevent contact with the masonry material

29. What type of metering device is used on a 12 SEER split air conditioning system...
The receiver
A TXV
The cooling contactor coil
Precharged refrigeration linesets

30. What type of fitting uses an O-ring to help seal its joint...
Metering device
To prevent condensation from forming
The temperature increases
A compression fitting

31. What is the 'are' terminal used for on the thermostat...
Precharged refrigeration linesets
Refrigerant must be added to the system
To prevent condensation from forming
The power from the transformer

32. What must be done to the system when a condensing unit is precharged for 25' of refrigerant line and uses 32' of refrigerant line...
Insulated
The suction line must be pitched toward the condensing unit
A compression fitting
Refrigerant must be added to the system

33. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
A TXV
Capillary action
The coil is precharged with nitrogen
Condenser

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

35. A split-system air conditioning unit has...
Metering device (restrictor)
Near a return-air grill
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Compressor

36. When installing a refrigeration line set through a masonry wall
The temperature increases
The lines must be covered by PVC to prevent contact with the masonry material
The coil is precharged with nitrogen
Must be coiled horizontally and the vapor must flow from top to bottom

37. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
Metering device (restrictor)
Condenser
Have a minimum perimeter of 3' larger than the unit being served
The contactor coil

38. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
A TXV
The cooling contactor coil
Compressor
Have a minimum perimeter of 3' larger than the unit being served

39. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
The heating control circuit
The accumulator
The contactor coil
Evaporator

40. What is the 'W' terminal used for on the thermostat...
The heating control circuit
The suction line must be pitched toward the condensing unit
The suction line must be pitched toward the condensing unit
Metering device

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

42. What is the 'G' terminal used for on the thermostat...
The suction line must be pitched toward the condensing unit
Evaporator
The blower relay coil
The cooling contactor coil

43. Residential split-system outdoor condensing units are commonly wired with a...
208-volt/240-volt single-phase power supply
The contactor coil
The blower relay coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

44. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
A TXV
Have a minimum perimeter of 3' larger than the unit being served
The power from the transformer
Evaporator

45. What is the 'W' terminal used for on the thermostat...
Have a minimum perimeter of 3' larger than the unit being served
24 volts
The accumulator
The heating control circuit

46. To ensure proper oil return to the compressor - when installing a refrigeration line set...
To prevent condensation from forming
The suction line must be pitched toward the condensing unit
Condenser
The receiver

47. In a sealed system - as the pressure increases...
Must be located in a conspicuous place to serve as an alarm
The cooling contactor coil
The coil is precharged with nitrogen
The temperature increases

48. Which part of the system stores refrigerant until it is needed in the evaporator...
The temperature increases
The suction line must be pitched toward the condensing unit
Condenser
The receiver

49. What is the 'G' terminal used for on the thermostat...
Condenser
A compression fitting
Must be located in a conspicuous place to serve as an alarm
The blower relay coil

50. A room thermostat should be mounted...
The suction line must be pitched toward the condensing unit
Near a return-air grill
Precharged refrigeration linesets
The cooling contactor coil