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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. What is the 'are' terminal used for on the thermostat...
Must be coiled horizontally and the vapor must flow from top to bottom
208-volt/240-volt single-phase power supply
The contactor coil
The power from the transformer

2. 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
24 volts
The lines must be covered by PVC to prevent contact with the masonry material

3. What must be done to the system when a condensing unit is precharged for 25' of refrigerant line and uses 32' of refrigerant line...
Metering device (restrictor)
Refrigerant must be added to the system
The lines must be covered by PVC to prevent contact with the masonry material
24 volts

4. An auxiliary drain pan must...

5. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
The blower relay coil
The contactor coil
Capillary action
The cooling contactor coil

6. Which part of the system prevents liquid from entering the compressor...
Have a minimum perimeter of 3' larger than the unit being served
The accumulator
The heating control circuit
Must be located in a conspicuous place to serve as an alarm

7. What is the 'are' terminal used for on the thermostat...
The heating control circuit
The power from the transformer
Precharged refrigeration linesets
The receiver

8. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
Condenser
Evaporator
Metering device
Refrigerant must be added to the system

9. A secondary drain line...
Must be located in a conspicuous place to serve as an alarm
A TXV
Compressor
The coil is precharged with nitrogen

10. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Must be coiled horizontally and the vapor must flow from top to bottom
Metering device (restrictor)
Compressor
Capillary action

11. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
The temperature increases
The suction line must be pitched toward the condensing unit
Evaporator
The coil is precharged with nitrogen

12. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
The blower relay coil
The coil is precharged with nitrogen
The cooling contactor coil
Must be coiled horizontally and the vapor must flow from top to bottom

13. What type of fitting uses an O-ring to help seal its joint...
208-volt/240-volt single-phase power supply
To prevent condensation from forming
A compression fitting
Check for tight connections at electrical terminals

14. 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
To prevent condensation from forming
Must be coiled horizontally and the vapor must flow from top to bottom
Have a minimum perimeter of 3' larger than the unit being served

15. A room thermostat should be mounted...
Near a return-air grill
The power from the transformer
This will prevent settling of the ground - which can cause refrigerant line damage
The coil is precharged with nitrogen

16. An auxiliary drain pan must...

17. Which part of the system stores refrigerant until it is needed in the evaporator...
Have a minimum perimeter of 3' larger than the unit being served
Capillary action
Condenser
The receiver

18. What type of metering device is used on a 12 SEER split air conditioning system...
Evaporator
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
A TXV
To prevent condensation from forming

19. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Check for tight connections at electrical terminals
Compressor
Evaporator
Capillary action

20. What is the 'W' terminal used for on the thermostat...
24 volts
Capillary action
Compressor
The heating control circuit

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

22. If ductwork is located in an attic or crawl space - it must be...
The power from the transformer
Capillary action
Insulated
Must be coiled horizontally and the vapor must flow from top to bottom

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

24. 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
Refrigerant must be added to the system
The power from the transformer

25. In a sealed system - as the pressure increases...
This will prevent settling of the ground - which can cause refrigerant line damage
Check for tight connections at electrical terminals
The temperature increases
The cooling contactor coil

26. What type of metering device is used on a 12 SEER split air conditioning system...
Check for tight connections at electrical terminals
Refrigerant must be added to the system
A TXV
Evaporator

27. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
The temperature increases
The accumulator
Condenser
The coil is precharged with nitrogen

28. Which part of the system prevents liquid from entering the compressor...
The heating control circuit
Metering device (restrictor)
Refrigerant must be added to the system
The accumulator

29. What is the secondary voltage on a step-down control transformer for a residential furnace...
Refrigerant must be added to the system
24 volts
Have a minimum perimeter of 3' larger than the unit being served
Capillary action

30. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
This will prevent settling of the ground - which can cause refrigerant line damage
Condenser
Metering device
24 volts

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

32. A secondary drain line...
Must be located in a conspicuous place to serve as an alarm
This will prevent settling of the ground - which can cause refrigerant line damage
The receiver
The blower relay coil

33. Residential split-system outdoor condensing units are commonly wired with a...
Refrigerant must be added to the system
The blower relay coil
Compressor
208-volt/240-volt single-phase power supply

34. What is the secondary voltage on a step-down control transformer for a residential furnace...
208-volt/240-volt single-phase power supply
Condenser
24 volts
The power from the transformer

35. What is the purpose for insulating a suction line...
To prevent condensation from forming
The heating control circuit
Refrigerant must be added to the system
Must be coiled horizontally and the vapor must flow from top to bottom

36. 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
Condenser
Check for tight connections at electrical terminals

37. Before energizing a newly installed system - what test should always be done...
Condenser
The blower relay coil
Metering device (restrictor)
Check for tight connections at electrical terminals

38. Before energizing a newly installed system - what test should always be done...
24 volts
208-volt/240-volt single-phase power supply
Condenser
Check for tight connections at electrical terminals

39. 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 power from the transformer
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Evaporator

40. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Condenser
The temperature increases
Compressor
Must be located in a conspicuous place to serve as an alarm

41. Which part of the system stores refrigerant until it is needed in the evaporator...
Capillary action
The accumulator
Evaporator
The receiver

42. To ensure proper oil return to the compressor - when installing a refrigeration line set...
The coil is precharged with nitrogen
The accumulator
The cooling contactor coil
The suction line must be pitched toward the condensing unit

43. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
Metering device (restrictor)
The contactor coil
208-volt/240-volt single-phase power supply
A TXV

44. Why is it recommended to add a gravel fill under the pad of a condensing unit...
24 volts
Metering device (restrictor)
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

45. A split-system air conditioning unit has...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The heating control circuit
The receiver
The coil is precharged with nitrogen

46. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
The lines must be covered by PVC to prevent contact with the masonry material
Metering device
Must be coiled horizontally and the vapor must flow from top to bottom
The temperature increases

47. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
Evaporator
The temperature increases
Metering device (restrictor)
Compressor

48. When installing a refrigeration line set through a masonry wall
The lines must be covered by PVC to prevent contact with the masonry material
Check for tight connections at electrical terminals
The temperature increases
Near a return-air grill

49. Quick-connect fittings are commonly used on...
Precharged refrigeration linesets
The cooling contactor coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The cooling contactor coil

50. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
The lines must be covered by PVC to prevent contact with the masonry material
Compressor
Metering device
The contactor coil