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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 - a coiled refrigeration lineset...
Compressor
Must be coiled horizontally and the vapor must flow from top to bottom
Condenser
The blower relay coil

2. Which part of the system prevents liquid from entering the compressor...
The suction line must be pitched toward the condensing unit
The accumulator
Evaporator
Insulated

3. What is the 'are' terminal used for on the thermostat...
Compressor
The power from the transformer
The receiver
The contactor coil

4. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
The temperature increases
Evaporator
The receiver
Condenser

5. Which part of the system stores refrigerant until it is needed in the evaporator...
The receiver
Must be located in a conspicuous place to serve as an alarm
Must be located in a conspicuous place to serve as an alarm
Check for tight connections at electrical terminals

6. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
The power from the transformer
The contactor coil
24 volts
Compressor

7. A split-system air conditioning unit has...
The lines must be covered by PVC to prevent contact with the masonry material
Capillary action
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Precharged refrigeration linesets

8. What is the 'W' terminal used for on the thermostat...
The heating control circuit
The cooling contactor coil
Condenser
A TXV

9. When installing a refrigeration line set through a masonry wall
208-volt/240-volt single-phase power supply
Evaporator
The lines must be covered by PVC to prevent contact with the masonry material
Insulated

10. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The power from the transformer
The suction line must be pitched toward the condensing unit
Metering device
The contactor coil

11. Why is it recommended to add a gravel fill under the pad of a condensing unit...
Metering device
The accumulator
The temperature increases
This will prevent settling of the ground - which can cause refrigerant line damage

12. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Condenser
Compressor
The accumulator
The power from the transformer

13. If ductwork is located in an attic or crawl space - it must be...
The heating control circuit
This will prevent settling of the ground - which can cause refrigerant line damage
The blower relay coil
Insulated

14. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
The coil is precharged with nitrogen
Condenser
Have a minimum perimeter of 3' larger than the unit being served
The suction line must be pitched toward the condensing unit

15. Which part of the system prevents liquid from entering the compressor...
The accumulator
Condenser
The lines must be covered by PVC to prevent contact with the masonry material
Compressor

16. A secondary drain line...
A compression fitting
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Must be located in a conspicuous place to serve as an alarm
To prevent condensation from forming

17. Quick-connect fittings are commonly used on...
Precharged refrigeration linesets
208-volt/240-volt single-phase power supply
Evaporator
Have a minimum perimeter of 3' larger than the unit being served

18. Why is it recommended to add a gravel fill under the pad of a condensing unit...
Capillary action
This will prevent settling of the ground - which can cause refrigerant line damage
Evaporator
A compression fitting

19. What is the secondary voltage on a step-down control transformer for a residential furnace...
A compression fitting
To prevent condensation from forming
24 volts
The power from the transformer

20. Before energizing a newly installed system - what test should always be done...
The cooling contactor coil
Check for tight connections at electrical terminals
The temperature increases
Refrigerant must be added to the system

21. What is the secondary voltage on a step-down control transformer for a residential furnace...
Capillary action
The blower relay coil
The coil is precharged with nitrogen
24 volts

22. 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 lines must be covered by PVC to prevent contact with the masonry material
The cooling contactor coil
The suction line must be pitched toward the condensing unit

23. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
This will prevent settling of the ground - which can cause refrigerant line damage
To prevent condensation from forming
Must be located in a conspicuous place to serve as an alarm
Evaporator

24. What is the purpose for insulating a suction line...
The suction line must be pitched toward the condensing unit
The suction line must be pitched toward the condensing unit
To prevent condensation from forming
A compression fitting

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

26. 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
A TXV
Condenser
Metering device

27. What is the 'G' terminal used for on the thermostat...
The blower relay coil
The receiver
The temperature increases
The cooling contactor coil

28. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Compressor
Have a minimum perimeter of 3' larger than the unit being served
Refrigerant must be added to the system
A TXV

29. In a sealed system - as the pressure increases...
Refrigerant must be added to the system
Check for tight connections at electrical terminals
Metering device (restrictor)
The temperature increases

30. A room thermostat should be mounted...
Metering device
Near a return-air grill
The temperature increases
Evaporator

31. An auxiliary drain pan must...

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32. Before energizing a newly installed system - what test should always be done...
The accumulator
The cooling contactor coil
The lines must be covered by PVC to prevent contact with the masonry material
Check for tight connections at electrical terminals

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...
Refrigerant must be added to the system
Capillary action
Compressor
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

34. What is the 'Y' terminal used for on the thermostat...
The accumulator
The cooling contactor coil
The power from the transformer
A TXV

35. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
Condenser
Metering device
The blower relay coil
Check for tight connections at electrical terminals

36. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
To prevent condensation from forming
Compressor
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The blower relay coil

37. What type of metering device is used on a 12 SEER split air conditioning system...
A TXV
The blower relay coil
The accumulator
Condenser

38. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
The blower relay coil
The heating control circuit
Capillary action
Near a return-air grill

39. 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
Refrigerant must be added to the system
The temperature increases
Near a return-air grill

40. A room thermostat should be mounted...
Metering device
A compression fitting
The suction line must be pitched toward the condensing unit
Near a return-air grill

41. What is the 'W' terminal used for on the thermostat...
To prevent condensation from forming
Check for tight connections at electrical terminals
Capillary action
The heating control circuit

42. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
Evaporator
208-volt/240-volt single-phase power supply
Capillary action
Insulated

43. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
Insulated
The receiver
The coil is precharged with nitrogen
24 volts

44. What is the 'are' terminal used for on the thermostat...
Must be coiled horizontally and the vapor must flow from top to bottom
The temperature increases
24 volts
The power from the transformer

45. Residential split-system outdoor condensing units are commonly wired with a...
208-volt/240-volt single-phase power supply
Metering device
Compressor
Refrigerant must be added to the system

46. Residential split-system outdoor condensing units are commonly wired with a...
Must be coiled horizontally and the vapor must flow from top to bottom
Check for tight connections at electrical terminals
The suction line must be pitched toward the condensing unit
208-volt/240-volt single-phase power supply

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

48. What type of metering device is used on a 12 SEER split air conditioning system...
Insulated
The temperature increases
A TXV
208-volt/240-volt single-phase power supply

49. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
Metering device (restrictor)
Capillary action
Condenser
The coil is precharged with nitrogen

50. What type of fitting uses an O-ring to help seal its joint...
A compression fitting
Have a minimum perimeter of 3' larger than the unit being served
Must be located in a conspicuous place to serve as an alarm
Check for tight connections at electrical terminals