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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. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
The cooling contactor coil
Evaporator
Capillary action
Near a return-air grill

2. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The contactor coil
The suction line must be pitched toward the condensing unit
A compression fitting
Evaporator

3. To ensure proper oil return to the compressor - when installing a refrigeration line set...
The suction line must be pitched toward the condensing unit
Near a return-air grill
The receiver
Compressor

4. 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
Check for tight connections at electrical terminals
Must be located in a conspicuous place to serve as an alarm
24 volts

5. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Metering device
Compressor
The accumulator

6. What is the 'are' terminal used for on the thermostat...
The power from the transformer
Compressor
Must be located in a conspicuous place to serve as an alarm
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

7. What is the 'G' terminal used for on the thermostat...
The blower relay coil
Capillary action
The suction line must be pitched toward the condensing unit
Metering device

8. In a sealed system - as the pressure increases...
The power from the transformer
The contactor coil
The temperature increases
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

9. What is the 'Y' terminal used for on the thermostat...
The blower relay coil
Capillary action
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The cooling contactor coil

10. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
Insulated
Metering device
Check for tight connections at electrical terminals
The cooling contactor coil

11. What type of fitting uses an O-ring to help seal its joint...
A compression fitting
Metering device (restrictor)
The blower relay coil
24 volts

12. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Evaporator
Metering device (restrictor)
Condenser
This will prevent settling of the ground - which can cause refrigerant line damage

13. When installing a refrigeration line set through a masonry wall
Compressor
The temperature increases
The blower relay coil
The lines must be covered by PVC to prevent contact with the masonry material

14. A room thermostat should be mounted...
A compression fitting
Precharged refrigeration linesets
Near a return-air grill
Condenser

15. What type of metering device is used on a 12 SEER split air conditioning system...
The power from the transformer
The blower relay coil
Condenser
A TXV

16. Residential split-system outdoor condensing units are commonly wired with a...
The accumulator
A TXV
208-volt/240-volt single-phase power supply
Condenser

17. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
A TXV
Compressor
Near a return-air grill
Insulated

18. An auxiliary drain pan must...

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19. 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
Compressor
The suction line must be pitched toward the condensing unit
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

20. What is the 'Y' terminal used for on the thermostat...
The temperature increases
The cooling contactor coil
Compressor
Condenser

21. What is the 'W' terminal used for on the thermostat...
Evaporator
Capillary action
The heating control circuit
The power from the transformer

22. A secondary drain line...
The suction line must be pitched toward the condensing unit
The accumulator
Must be located in a conspicuous place to serve as an alarm
Evaporator

23. An auxiliary drain pan must...

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24. Quick-connect fittings are commonly used on...
Precharged refrigeration linesets
208-volt/240-volt single-phase power supply
Refrigerant must be added to the system
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

25. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
A TXV
Must be coiled horizontally and the vapor must flow from top to bottom
The cooling contactor coil
The heating control circuit

26. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
Condenser
The heating control circuit
A TXV
The power from the transformer

27. A split-system air conditioning unit has...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Metering device (restrictor)
The heating control circuit
The suction line must be pitched toward the condensing unit

28. What is the secondary voltage on a step-down control transformer for a residential furnace...
Capillary action
The power from the transformer
24 volts
Capillary action

29. Which part of the system stores refrigerant until it is needed in the evaporator...
Capillary action
The receiver
Insulated
The temperature increases

30. What is the purpose for insulating a suction line...
To prevent condensation from forming
Condenser
Capillary action
Insulated

31. What is the 'G' terminal used for on the thermostat...
Metering device (restrictor)
Refrigerant must be added to the system
The blower relay coil
208-volt/240-volt single-phase power supply

32. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Must be located in a conspicuous place to serve as an alarm
The coil is precharged with nitrogen
Evaporator
The suction line must be pitched toward the condensing unit

33. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
Evaporator
The lines must be covered by PVC to prevent contact with the masonry material
Must be coiled horizontally and the vapor must flow from top to bottom
Condenser

34. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Metering device (restrictor)
The heating control circuit
A TXV
Capillary action

35. What is the 'W' terminal used for on the thermostat...
The heating control circuit
Insulated
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Evaporator

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 temperature increases
The power from the transformer
The accumulator

37. Which part of the system prevents liquid from entering the compressor...
Check for tight connections at electrical terminals
The accumulator
Condenser
Condenser

38. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Compressor
The receiver
Evaporator
The cooling contactor coil

39. What type of metering device is used on a 12 SEER split air conditioning system...
Have a minimum perimeter of 3' larger than the unit being served
208-volt/240-volt single-phase power supply
A TXV
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

40. Before energizing a newly installed system - what test should always be done...
The power from the transformer
The power from the transformer
Check for tight connections at electrical terminals
A compression fitting

41. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The contactor coil
Must be coiled horizontally and the vapor must flow from top to bottom
To prevent condensation from forming
Must be located in a conspicuous place to serve as an alarm

42. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
The receiver
Condenser
Metering device (restrictor)
Refrigerant must be added to the system

43. 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
Compressor
The lines must be covered by PVC to prevent contact with the masonry material
The power from the transformer

44. 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 receiver
A TXV
Must be located in a conspicuous place to serve as an alarm
Refrigerant must be added to the system

45. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
The power from the transformer
Near a return-air grill
Evaporator
The coil is precharged with nitrogen

46. Residential split-system outdoor condensing units are commonly wired with a...
Condenser
The coil is precharged with nitrogen
208-volt/240-volt single-phase power supply
The receiver

47. 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
The accumulator
The heating control circuit
208-volt/240-volt single-phase power supply

48. Which part of the system prevents liquid from entering the compressor...
Condenser
Must be located in a conspicuous place to serve as an alarm
The accumulator
The power from the transformer

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

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