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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
A TXV
24 volts
Condenser

2. To ensure proper oil return to the compressor - when installing a refrigeration line set...
The heating control circuit
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Compressor
The suction line must be pitched toward the condensing unit

3. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
Near a return-air grill
Metering device
Have a minimum perimeter of 3' larger than the unit being served
24 volts

4. What type of fitting uses an O-ring to help seal its joint...
Check for tight connections at electrical terminals
Must be located in a conspicuous place to serve as an alarm
A compression fitting
Evaporator

5. What is the 'are' terminal used for on the thermostat...
Evaporator
Compressor
Capillary action
The power from the transformer

6. 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
The cooling contactor coil
The suction line must be pitched toward the condensing unit
Have a minimum perimeter of 3' larger than the unit being served

7. An auxiliary drain pan must...

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8. A split-system air conditioning unit has...
The cooling contactor coil
The lines must be covered by PVC to prevent contact with the masonry material
The heating control circuit
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

9. Before energizing a newly installed system - what test should always be done...
The power from the transformer
Check for tight connections at electrical terminals
24 volts
Compressor

10. What is the purpose for insulating a suction line...
To prevent condensation from forming
This will prevent settling of the ground - which can cause refrigerant line damage
The contactor coil
24 volts

11. Residential split-system outdoor condensing units are commonly wired with a...
Metering device
To prevent condensation from forming
Must be coiled horizontally and the vapor must flow from top to bottom
208-volt/240-volt single-phase power supply

12. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
Condenser
To prevent condensation from forming
Compressor
The accumulator

13. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
The cooling contactor coil
This will prevent settling of the ground - which can cause refrigerant line damage
A compression fitting
Evaporator

14. A split-system air conditioning unit has...
Refrigerant must be added to the system
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
Must be located in a conspicuous place to serve as an alarm

15. 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 receiver
Compressor
24 volts

16. A room thermostat should be mounted...
Near a return-air grill
Evaporator
The accumulator
Metering device (restrictor)

17. Why is it recommended to add a gravel fill under the pad of a condensing unit...
Precharged refrigeration linesets
Refrigerant must be added to the system
This will prevent settling of the ground - which can cause refrigerant line damage
Near a return-air grill

18. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
Must be located in a conspicuous place to serve as an alarm
The contactor coil
Condenser
Capillary action

19. What is the 'G' terminal used for on the thermostat...
Metering device (restrictor)
Condenser
Metering device
The blower relay coil

20. What is the 'Y' terminal used for on the thermostat...
Refrigerant must be added to the system
The cooling contactor coil
208-volt/240-volt single-phase power supply
The lines must be covered by PVC to prevent contact with the masonry material

21. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Condenser
Refrigerant must be added to the system
The coil is precharged with nitrogen
Metering device (restrictor)

22. Which part of the system prevents liquid from entering the compressor...
To prevent condensation from forming
The temperature increases
The heating control circuit
The accumulator

23. What is the 'Y' terminal used for on the thermostat...
Have a minimum perimeter of 3' larger than the unit being served
The cooling contactor coil
Insulated
24 volts

24. If ductwork is located in an attic or crawl space - it must be...
Insulated
A compression fitting
The blower relay coil
To prevent condensation from forming

25. Residential split-system outdoor condensing units are commonly wired with a...
Capillary action
Metering device (restrictor)
Metering device (restrictor)
208-volt/240-volt single-phase power supply

26. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Condenser
The suction line must be pitched toward the condensing unit
Compressor
The lines must be covered by PVC to prevent contact with the masonry material

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

28. What is the 'W' terminal used for on the thermostat...
The heating control circuit
The contactor coil
Metering device (restrictor)
Condenser

29. In a sealed system - as the pressure increases...
Have a minimum perimeter of 3' larger than the unit being served
Condenser
208-volt/240-volt single-phase power supply
The temperature increases

30. A secondary drain line...
The suction line must be pitched toward the condensing unit
A TXV
Must be coiled horizontally and the vapor must flow from top to bottom
Must be located in a conspicuous place to serve as an alarm

31. A room thermostat should be mounted...
Near a return-air grill
Condenser
The contactor coil
To prevent condensation from forming

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

33. Quick-connect fittings are commonly used on...
Precharged refrigeration linesets
Capillary action
The temperature increases
A compression fitting

34. What is the purpose for insulating a suction line...
Precharged refrigeration linesets
Capillary action
Refrigerant must be added to the system
To prevent condensation from forming

35. Which part of the system stores refrigerant until it is needed in the evaporator...
208-volt/240-volt single-phase power supply
The receiver
The coil is precharged with nitrogen
The heating control circuit

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

37. When installing a refrigeration line set through a masonry wall
Compressor
Evaporator
The lines must be covered by PVC to prevent contact with the masonry material
Have a minimum perimeter of 3' larger than the unit being served

38. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
The coil is precharged with nitrogen
Evaporator
Capillary action
24 volts

39. When installing a refrigeration line set through a masonry wall
Refrigerant must be added to the system
The lines must be covered by PVC to prevent contact with the masonry material
The cooling contactor coil
The blower relay coil

40. What is the secondary voltage on a step-down control transformer for a residential furnace...
Compressor
Near a return-air grill
Condenser
24 volts

41. What type of metering device is used on a 12 SEER split air conditioning system...
24 volts
To prevent condensation from forming
A TXV
The coil is precharged with nitrogen

42. What type of fitting uses an O-ring to help seal its joint...
The coil is precharged with nitrogen
Check for tight connections at electrical terminals
Metering device (restrictor)
A compression fitting

43. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
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
A TXV

44. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
The temperature increases
24 volts
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Evaporator

45. What is the secondary voltage on a step-down control transformer for a residential furnace...
Check for tight connections at electrical terminals
Evaporator
24 volts
The coil is precharged with nitrogen

46. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
208-volt/240-volt single-phase power supply
The blower relay coil
Must be coiled horizontally and the vapor must flow from top to bottom
Condenser

47. In a sealed system - as the pressure increases...
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
The temperature increases
Precharged refrigeration linesets

48. Quick-connect fittings are commonly used on...
Near a return-air grill
Precharged refrigeration linesets
A compression fitting
The blower relay coil

49. If ductwork is located in an attic or crawl space - it must be...
The accumulator
Insulated
Capillary action
Compressor

50. What is the 'W' terminal used for on the thermostat...
The heating control circuit
Metering device
To prevent condensation from forming
The cooling contactor coil