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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...
Evaporator
The blower relay coil
The suction line must be pitched toward the condensing unit
Insulated

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

3. What is the 'W' terminal used for on the thermostat...
The coil is precharged with nitrogen
The heating control circuit
Must be coiled horizontally and the vapor must flow from top to bottom
This will prevent settling of the ground - which can cause refrigerant line damage

4. When installing a refrigeration line set through a masonry wall
Evaporator
The blower relay coil
The coil is precharged with nitrogen
The lines must be covered by PVC to prevent contact with the masonry material

5. What must be done to the system when a condensing unit is precharged for 25' of refrigerant line and uses 32' of refrigerant line...
Near a return-air grill
Refrigerant must be added to the system
Condenser
Evaporator

6. A split-system air conditioning unit has...
This will prevent settling of the ground - which can cause refrigerant line damage
Evaporator
A compression fitting
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

7. What is the 'Y' terminal used for on the thermostat...
Metering device
Condenser
The cooling contactor coil
This will prevent settling of the ground - which can cause refrigerant line damage

8. Which part of the system prevents liquid from entering the compressor...
Must be coiled horizontally and the vapor must flow from top to bottom
The accumulator
Condenser
Must be located in a conspicuous place to serve as an alarm

9. Before energizing a newly installed system - what test should always be done...
The suction line must be pitched toward the condensing unit
Check for tight connections at electrical terminals
The temperature increases
Insulated

10. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
24 volts
Evaporator
Capillary action
Metering device (restrictor)

11. An auxiliary drain pan must...

12. 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
The contactor coil
The accumulator
Compressor

13. When installing a refrigeration line set through a masonry wall
Refrigerant must be added to the system
Condenser
The lines must be covered by PVC to prevent contact with the masonry material
The receiver

14. A room thermostat should be mounted...
Must be coiled horizontally and the vapor must flow from top to bottom
Near a return-air grill
Refrigerant must be added to the system
The cooling contactor coil

15. 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
A compression fitting
The blower relay coil
The cooling contactor coil

16. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
Condenser
A compression fitting
Precharged refrigeration linesets
The heating control circuit

17. What type of fitting uses an O-ring to help seal its joint...
208-volt/240-volt single-phase power supply
The receiver
Evaporator
A compression fitting

18. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
Near a return-air grill
Evaporator
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
208-volt/240-volt single-phase power supply

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

20. What is the secondary voltage on a step-down control transformer for a residential furnace...
To prevent condensation from forming
Metering device (restrictor)
24 volts
Near a return-air grill

21. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Capillary action
The power from the transformer
208-volt/240-volt single-phase power supply
This will prevent settling of the ground - which can cause refrigerant line damage

22. What is the 'G' terminal used for on the thermostat...
The blower relay coil
Have a minimum perimeter of 3' larger than the unit being served
Capillary action
The receiver

23. What is the 'W' terminal used for on the thermostat...
Condenser
Refrigerant must be added to the system
The heating control circuit
A TXV

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

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

26. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
Metering device
Capillary action
Have a minimum perimeter of 3' larger than the unit being served
Must be coiled horizontally and the vapor must flow from top to bottom

27. In a sealed system - as the pressure increases...
The coil is precharged with nitrogen
Insulated
The temperature increases
To prevent condensation from forming

28. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Capillary action
Compressor
To prevent condensation from forming
Metering device

29. To ensure proper oil return to the compressor - when installing a refrigeration line set...
The suction line must be pitched toward the condensing unit
Must be coiled horizontally and the vapor must flow from top to bottom
The coil is precharged with nitrogen
Metering device (restrictor)

30. A split-system air conditioning unit has...
The coil is precharged with nitrogen
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The contactor coil
Metering device (restrictor)

31. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
208-volt/240-volt single-phase power supply
Capillary action
The contactor coil
Compressor

32. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Metering device
The power from the transformer
Metering device
Compressor

33. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
Near a return-air grill
The contactor coil
The accumulator
A TXV

34. What type of metering device is used on a 12 SEER split air conditioning system...
To prevent condensation from forming
The suction line must be pitched toward the condensing unit
24 volts
A TXV

35. If ductwork is located in an attic or crawl space - it must be...
The power from the transformer
The cooling contactor coil
The suction line must be pitched toward the condensing unit
Insulated

36. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
24 volts
Condenser
The power from the transformer
Near a return-air grill

37. What type of fitting uses an O-ring to help seal its joint...
Condenser
The blower relay coil
To prevent condensation from forming
A compression fitting

38. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Must be coiled horizontally and the vapor must flow from top to bottom
Compressor
Evaporator
Condenser

39. Why is it recommended to add a gravel fill under the pad of a condensing unit...
Metering device
Must be coiled horizontally and the vapor must flow from top to bottom
This will prevent settling of the ground - which can cause refrigerant line damage
Condenser

40. Residential split-system outdoor condensing units are commonly wired with a...
The power from the transformer
The blower relay coil
208-volt/240-volt single-phase power supply
To prevent condensation from forming

41. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
The power from the transformer
The temperature increases
Metering device
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

42. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Near a return-air grill
Evaporator
This will prevent settling of the ground - which can cause refrigerant line damage
Precharged refrigeration linesets

43. A room thermostat should be mounted...
Near a return-air grill
A TXV
The temperature increases
Compressor

44. What is the purpose for insulating a suction line...
The blower relay coil
To prevent condensation from forming
Condenser
The receiver

45. What type of metering device is used on a 12 SEER split air conditioning system...
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
A TXV
Have a minimum perimeter of 3' larger than the unit being served

46. What must be done to the system when a condensing unit is precharged for 25' of refrigerant line and uses 32' of refrigerant line...
Near a return-air grill
24 volts
Refrigerant must be added to the system
A TXV

47. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
Have a minimum perimeter of 3' larger than the unit being served
The temperature increases
Condenser
This will prevent settling of the ground - which can cause refrigerant line damage

48. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Capillary action
The temperature increases
The heating control circuit
The temperature increases

49. 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
Refrigerant must be added to the system
Check for tight connections at electrical terminals
The heating control circuit

50. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
The cooling contactor coil
A compression fitting
Condenser
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator