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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 'G' terminal used for on the thermostat...
The blower relay coil
Compressor
To prevent condensation from forming
A TXV

2. What is the 'W' terminal used for on the thermostat...
The heating control circuit
Precharged refrigeration linesets
To prevent condensation from forming
Must be located in a conspicuous place to serve as an alarm

3. If ductwork is located in an attic or crawl space - it must be...
The lines must be covered by PVC to prevent contact with the masonry material
Insulated
Metering device (restrictor)
The heating control circuit

4. What type of fitting uses an O-ring to help seal its joint...
The lines must be covered by PVC to prevent contact with the masonry material
The power from the transformer
A compression fitting
Condenser

5. What is the 'are' terminal used for on the thermostat...
Capillary action
The power from the transformer
Evaporator
The suction line must be pitched toward the condensing unit

6. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The contactor coil
208-volt/240-volt single-phase power supply
208-volt/240-volt single-phase power supply
Must be coiled horizontally and the vapor must flow from top to bottom

7. 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
Refrigerant must be added to the system
The cooling contactor coil
The temperature increases

8. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
The coil is precharged with nitrogen
The receiver
Metering device (restrictor)
The suction line must be pitched toward the condensing unit

9. 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
Compressor
The temperature increases
Metering device

10. An auxiliary drain pan must...

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

12. What type of metering device is used on a 12 SEER split air conditioning system...
Must be located in a conspicuous place to serve as an alarm
A TXV
Metering device
The coil is precharged with nitrogen

13. Which part of the system prevents liquid from entering the compressor...
Check for tight connections at electrical terminals
24 volts
The accumulator
Near a return-air grill

14. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
The blower relay coil
Compressor
A TXV
Metering device

15. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
To prevent condensation from forming
Capillary action
Evaporator
The cooling contactor coil

16. 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
The temperature increases
208-volt/240-volt single-phase power supply
The receiver

17. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
To prevent condensation from forming
Condenser
Precharged refrigeration linesets
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

18. To ensure proper oil return to the compressor - when installing a refrigeration line set...
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
Refrigerant must be added to the system
Capillary action

19. A secondary drain line...
The cooling contactor coil
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
This will prevent settling of the ground - which can cause refrigerant line damage

20. What is the 'W' terminal used for on the thermostat...
A compression fitting
Evaporator
Evaporator
The heating control circuit

21. Quick-connect fittings are commonly used on...
Refrigerant must be added to the system
Precharged refrigeration linesets
Compressor
24 volts

22. In a sealed system - as the pressure increases...
The temperature increases
The suction line must be pitched toward the condensing unit
The lines must be covered by PVC to prevent contact with the masonry material
The accumulator

23. Residential split-system outdoor condensing units are commonly wired with a...
Precharged refrigeration linesets
208-volt/240-volt single-phase power supply
The cooling contactor coil
Metering device (restrictor)

24. In a sealed system - as the pressure increases...
The receiver
The receiver
The temperature increases
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

25. 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
Check for tight connections at electrical terminals
Condenser
A TXV

26. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Near a return-air grill
Must be coiled horizontally and the vapor must flow from top to bottom
The contactor coil

27. 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 coil is precharged with nitrogen
Refrigerant must be added to the system
The temperature increases
Near a return-air grill

28. What type of metering device is used on a 12 SEER split air conditioning system...
A TXV
Compressor
Capillary action
Near a return-air grill

29. What type of fitting uses an O-ring to help seal its joint...
Refrigerant must be added to the system
Insulated
A compression fitting
To prevent condensation from forming

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

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

32. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
To prevent condensation from forming
The coil is precharged with nitrogen
Evaporator
The blower relay coil

33. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Precharged refrigeration linesets
This will prevent settling of the ground - which can cause refrigerant line damage
Compressor
The receiver

34. 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
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
208-volt/240-volt single-phase power supply

35. When installing a refrigeration line set through a masonry wall
208-volt/240-volt single-phase power supply
The lines must be covered by PVC to prevent contact with the masonry material
Have a minimum perimeter of 3' larger than the unit being served
Condenser

36. A split-system air conditioning unit has...
Evaporator
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Condenser
Refrigerant must be added to the system

37. Why is it recommended to add a gravel fill under the pad of a condensing unit...
Compressor
This will prevent settling of the ground - which can cause refrigerant line damage
Metering device
Evaporator

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

39. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Condenser
Condenser
The power from the transformer
Evaporator

40. When installing a refrigeration line set through a masonry wall
The lines must be covered by PVC to prevent contact with the masonry material
Metering device
The heating control circuit
Condenser

41. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
This will prevent settling of the ground - which can cause refrigerant line damage
Must be located in a conspicuous place to serve as an alarm
Capillary action
Must be coiled horizontally and the vapor must flow from top to bottom

42. 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
24 volts
Capillary action
208-volt/240-volt single-phase power supply

43. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Compressor
This will prevent settling of the ground - which can cause refrigerant line damage
Condenser
The suction line must be pitched toward the condensing unit

44. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
The contactor coil
Condenser
A TXV
The cooling contactor coil

45. 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 coil is precharged with nitrogen
The blower relay coil
The coil is precharged with nitrogen

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

47. A room thermostat should be mounted...
The lines must be covered by PVC to prevent contact with the masonry material
Near a return-air grill
Evaporator
The heating control circuit

48. What is the secondary voltage on a step-down control transformer for a residential furnace...
24 volts
The coil is precharged with nitrogen
Metering device
The coil is precharged with nitrogen

49. Which part of the system stores refrigerant until it is needed in the evaporator...
The heating control circuit
Compressor
Precharged refrigeration linesets
The receiver

50. What is the 'Y' terminal used for on the thermostat...
Refrigerant must be added to the system
The cooling contactor coil
Capillary action
To prevent condensation from forming