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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. A secondary drain line...
Capillary action
Metering device (restrictor)
Must be located in a conspicuous place to serve as an alarm
A TXV

2. An auxiliary drain pan must...

3. What is the 'W' terminal used for on the thermostat...
The lines must be covered by PVC to prevent contact with the masonry material
Metering device
The heating control circuit
The temperature increases

4. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
Near a return-air grill
A compression fitting
Condenser
Insulated

5. An auxiliary drain pan must...

6. A split-system air conditioning unit has...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Near a return-air grill
Condenser
The cooling contactor coil

7. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Precharged refrigeration linesets
Evaporator
To prevent condensation from forming
Metering device (restrictor)

8. Which part of the system stores refrigerant until it is needed in the evaporator...
The receiver
24 volts
This will prevent settling of the ground - which can cause refrigerant line damage
The coil is precharged with nitrogen

9. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Capillary action
Condenser
Insulated
Precharged refrigeration linesets

10. What is the 'W' terminal used for on the thermostat...
Check for tight connections at electrical terminals
The accumulator
The heating control circuit
Near a return-air grill

11. What is the 'G' terminal used for on the thermostat...
The blower relay coil
Evaporator
Compressor
Must be coiled horizontally and the vapor must flow from top to bottom

12. What type of metering device is used on a 12 SEER split air conditioning system...
A TXV
Near a return-air grill
208-volt/240-volt single-phase power supply
Must be coiled horizontally and the vapor must flow from top to bottom

13. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
The heating control circuit
Must be coiled horizontally and the vapor must flow from top to bottom
Condenser
The lines must be covered by PVC to prevent contact with the masonry material

14. 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
Precharged refrigeration linesets
Metering device (restrictor)
Compressor

15. Quick-connect fittings are commonly used on...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Precharged refrigeration linesets
Metering device
Condenser

16. Quick-connect fittings are commonly used on...
Precharged refrigeration linesets
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
Must be located in a conspicuous place to serve as an alarm

17. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Compressor
Capillary action
Check for tight connections at electrical terminals
The lines must be covered by PVC to prevent contact with the masonry material

18. 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
Must be coiled horizontally and the vapor must flow from top to bottom
208-volt/240-volt single-phase power supply
24 volts

19. What is the 'Y' terminal used for on the thermostat...
Must be coiled horizontally and the vapor must flow from top to bottom
The cooling contactor coil
Evaporator
The lines must be covered by PVC to prevent contact with the masonry material

20. Before energizing a newly installed system - what test should always be done...
Check for tight connections at electrical terminals
Capillary action
Precharged refrigeration linesets
Compressor

21. In a sealed system - as the pressure increases...
Insulated
The receiver
Must be located in a conspicuous place to serve as an alarm
The temperature increases

22. What type of fitting uses an O-ring to help seal its joint...
208-volt/240-volt single-phase power supply
The contactor coil
A compression fitting
24 volts

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

24. Residential split-system outdoor condensing units are commonly wired with a...
A compression fitting
The temperature increases
Must be coiled horizontally and the vapor must flow from top to bottom
208-volt/240-volt single-phase power supply

25. If ductwork is located in an attic or crawl space - it must be...
Insulated
The receiver
The accumulator
A TXV

26. What type of fitting uses an O-ring to help seal its joint...
Condenser
Insulated
Must be located in a conspicuous place to serve as an alarm
A compression fitting

27. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
The receiver
Compressor
The receiver
Condenser

28. What is the 'Y' terminal used for on the thermostat...
The cooling contactor coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Evaporator
Compressor

29. A secondary drain line...
Condenser
Condenser
Must be located in a conspicuous place to serve as an alarm
Evaporator

30. What is the 'are' terminal used for on the thermostat...
The power from the transformer
Condenser
Must be located in a conspicuous place to serve as an alarm
The coil is precharged with nitrogen

31. What is the 'G' terminal used for on the thermostat...
The blower relay coil
Capillary action
Must be located in a conspicuous place to serve as an alarm
The heating control circuit

32. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
The receiver
The contactor coil
Capillary action
Must be coiled horizontally and the vapor must flow from top to bottom

33. What type of metering device is used on a 12 SEER split air conditioning system...
The heating control circuit
A TXV
The blower relay coil
The accumulator

34. Which part of the system prevents liquid from entering the compressor...
The accumulator
Check for tight connections at electrical terminals
To prevent condensation from forming
Metering device (restrictor)

35. In a sealed system - as the pressure increases...
The temperature increases
Insulated
Capillary action
Compressor

36. What is the 'are' terminal used for on the thermostat...
The lines must be covered by PVC to prevent contact with the masonry material
The power from the transformer
Insulated
208-volt/240-volt single-phase power supply

37. 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 power from the transformer
The lines must be covered by PVC to prevent contact with the masonry material
The cooling contactor coil

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

39. If ductwork is located in an attic or crawl space - it must be...
Insulated
This will prevent settling of the ground - which can cause refrigerant line damage
The accumulator
The coil is precharged with nitrogen

40. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
The heating control circuit
Compressor
Refrigerant must be added to the system
Metering device (restrictor)

41. 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 coil is precharged with nitrogen
The contactor coil
A TXV

42. A room thermostat should be mounted...
The blower relay coil
Have a minimum perimeter of 3' larger than the unit being served
Compressor
Near a return-air grill

43. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
The coil is precharged with nitrogen
The temperature increases
The coil is precharged with nitrogen
Evaporator

44. What is the secondary voltage on a step-down control transformer for a residential furnace...
The accumulator
A TXV
24 volts
The receiver

45. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
Metering device (restrictor)
Condenser
The contactor coil
Condenser

46. A room thermostat should be mounted...
Compressor
Near a return-air grill
Must be located in a conspicuous place to serve as an alarm
To prevent condensation from forming

47. When installing a refrigeration line set through a masonry wall
The cooling contactor coil
Compressor
The lines must be covered by PVC to prevent contact with the masonry material
Condenser

48. 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
Check for tight connections at electrical terminals
The power from the transformer
Insulated

49. Which part of the system prevents liquid from entering the compressor...
The accumulator
Evaporator
This will prevent settling of the ground - which can cause refrigerant line damage
The lines must be covered by PVC to prevent contact with the masonry material

50. What is the secondary voltage on a step-down control transformer for a residential furnace...
Near a return-air grill
The heating control circuit
Condenser
24 volts