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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 suction line must be pitched toward the condensing unit
The cooling contactor coil
Condenser
Capillary action

2. 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 lines must be covered by PVC to prevent contact with the masonry material
Precharged refrigeration linesets
Insulated
Refrigerant must be added to the system

3. What is the purpose for insulating a suction line...
The temperature increases
To prevent condensation from forming
The lines must be covered by PVC to prevent contact with the masonry material
The blower relay coil

4. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
A compression fitting
Evaporator
A TXV
Condenser

5. Which part of the system prevents liquid from entering the compressor...
Compressor
Capillary action
Condenser
The accumulator

6. If ductwork is located in an attic or crawl space - it must be...
The suction line must be pitched toward the condensing unit
A compression fitting
Condenser
Insulated

7. What is the 'Y' terminal used for on the thermostat...
Must be located in a conspicuous place to serve as an alarm
Compressor
A TXV
The cooling contactor coil

8. What type of metering device is used on a 12 SEER split air conditioning system...
24 volts
A TXV
The heating control circuit
Condenser

9. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Metering device (restrictor)
The coil is precharged with nitrogen
This will prevent settling of the ground - which can cause refrigerant line damage

10. Before energizing a newly installed system - what test should always be done...
Check for tight connections at electrical terminals
Must be coiled horizontally and the vapor must flow from top to bottom
Insulated
The accumulator

11. When installing a refrigeration line set through a masonry wall
Insulated
The lines must be covered by PVC to prevent contact with the masonry material
Condenser
Metering device (restrictor)

12. To ensure proper oil return to the compressor - when installing a refrigeration line set...
The temperature increases
The contactor coil
The suction line must be pitched toward the condensing unit
A TXV

13. What type of fitting uses an O-ring to help seal its joint...
A compression fitting
Must be coiled horizontally and the vapor must flow from top to bottom
Evaporator
Metering device

14. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
A TXV
Refrigerant must be added to the system
Condenser
The coil is precharged with nitrogen

15. What type of metering device is used on a 12 SEER split air conditioning system...
The receiver
A TXV
Compressor
Condenser

16. What is the 'are' terminal used for on the thermostat...
The receiver
The contactor coil
Precharged refrigeration linesets
The power from the transformer

17. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
Check for tight connections at electrical terminals
Capillary action
Metering device
Evaporator

18. Which part of the system stores refrigerant until it is needed in the evaporator...
The blower relay coil
The suction line must be pitched toward the condensing unit
The receiver
24 volts

19. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
208-volt/240-volt single-phase power supply
Must be located in a conspicuous place to serve as an alarm
Must be coiled horizontally and the vapor must flow from top to bottom
The coil is precharged with nitrogen

20. An auxiliary drain pan must...

21. Why is it recommended to add a gravel fill under the pad of a condensing unit...
Refrigerant must be added to the system
This will prevent settling of the ground - which can cause refrigerant line damage
Compressor
Metering device (restrictor)

22. Which part of the system stores refrigerant until it is needed in the evaporator...
To prevent condensation from forming
The receiver
A TXV
Evaporator

23. What is the 'W' terminal used for on the thermostat...
The heating control circuit
24 volts
Condenser
Compressor

24. In a sealed system - as the pressure increases...
The temperature increases
24 volts
Metering device (restrictor)
The coil is precharged with nitrogen

25. A secondary drain line...
The contactor coil
208-volt/240-volt single-phase power supply
Metering device (restrictor)
Must be located in a conspicuous place to serve as an alarm

26. Before energizing a newly installed system - what test should always be done...
Check for tight connections at electrical terminals
The cooling contactor coil
Metering device (restrictor)
Must be coiled horizontally and the vapor must flow from top to bottom

27. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
Must be coiled horizontally and the vapor must flow from top to bottom
Condenser
The receiver
Capillary action

28. Residential split-system outdoor condensing units are commonly wired with a...
The power from the transformer
208-volt/240-volt single-phase power supply
24 volts
The blower relay coil

29. An auxiliary drain pan must...

30. In a sealed system - as the pressure increases...
The lines must be covered by PVC to prevent contact with the masonry material
The coil is precharged with nitrogen
Check for tight connections at electrical terminals
The temperature increases

31. Quick-connect fittings are commonly used on...
Precharged refrigeration linesets
A TXV
Evaporator
The cooling contactor coil

32. What is the secondary voltage on a step-down control transformer for a residential furnace...
The coil is precharged with nitrogen
Metering device
The suction line must be pitched toward the condensing unit
24 volts

33. Which part of the system prevents liquid from entering the compressor...
Metering device
Evaporator
The accumulator
This will prevent settling of the ground - which can cause refrigerant line damage

34. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Compressor
Metering device
The blower relay coil
This will prevent settling of the ground - which can cause refrigerant line damage

35. What is the 'Y' terminal used for on the thermostat...
Metering device (restrictor)
To prevent condensation from forming
Check for tight connections at electrical terminals
The cooling contactor coil

36. 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 lines must be covered by PVC to prevent contact with the masonry material

37. A split-system air conditioning unit has...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The power from the transformer
Capillary action
Precharged refrigeration linesets

38. 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 heating control circuit
A compression fitting
Check for tight connections at electrical terminals

39. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
A TXV
Condenser
Compressor
Refrigerant must be added to the system

40. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
Refrigerant must be added to the system
Metering device
Precharged refrigeration linesets
A compression fitting

41. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
208-volt/240-volt single-phase power supply
The cooling contactor coil
A TXV
Compressor

42. A room thermostat should be mounted...
24 volts
To prevent condensation from forming
Must be coiled horizontally and the vapor must flow from top to bottom
Near a return-air grill

43. What is the 'are' terminal used for on the thermostat...
A TXV
Check for tight connections at electrical terminals
The receiver
The power from the transformer

44. If ductwork is located in an attic or crawl space - it must be...
The temperature increases
Have a minimum perimeter of 3' larger than the unit being served
Insulated
Condenser

45. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
A compression fitting
Metering device
Must be coiled horizontally and the vapor must flow from top to bottom
The suction line must be pitched toward the condensing unit

46. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Evaporator
Must be coiled horizontally and the vapor must flow from top to bottom
Condenser
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

47. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Condenser
Compressor
The cooling contactor coil
The receiver

48. What is the 'W' terminal used for on the thermostat...
The suction line must be pitched toward the condensing unit
The receiver
The heating control circuit
The temperature increases

49. What is the 'G' terminal used for on the thermostat...
A compression fitting
The blower relay coil
This will prevent settling of the ground - which can cause refrigerant line damage
The contactor coil

50. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
The cooling contactor coil
Capillary action
Metering device (restrictor)
Have a minimum perimeter of 3' larger than the unit being served