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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. A secondary drain line...
Near a return-air grill
Have a minimum perimeter of 3' larger than the unit being served
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

2. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
Condenser
Insulated
Near a return-air grill
Compressor

3. What is the 'W' terminal used for on the thermostat...
The heating control circuit
Condenser
Condenser
Must be coiled horizontally and the vapor must flow from top to bottom

4. A room thermostat should be mounted...
Near a return-air grill
Must be located in a conspicuous place to serve as an alarm
A TXV
Metering device

5. What is the 'Y' terminal used for on the thermostat...
The contactor coil
The heating control circuit
The cooling contactor coil
Metering device (restrictor)

6. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
This will prevent settling of the ground - which can cause refrigerant line damage
Capillary action
Must be located in a conspicuous place to serve as an alarm
The contactor coil

7. What is the 'are' terminal used for on the thermostat...
Have a minimum perimeter of 3' larger than the unit being served
The contactor coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The power from the transformer

8. Residential split-system outdoor condensing units are commonly wired with a...
The suction line must be pitched toward the condensing unit
Compressor
The power from the transformer
208-volt/240-volt single-phase power supply

9. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Compressor
The coil is precharged with nitrogen
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

10. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
Evaporator
The coil is precharged with nitrogen
The cooling contactor coil
Insulated

11. 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
Must be located in a conspicuous place to serve as an alarm
The accumulator
Condenser

12. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The power from the transformer
Have a minimum perimeter of 3' larger than the unit being served
Must be located in a conspicuous place to serve as an alarm
The contactor coil

13. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Refrigerant must be added to the system
Condenser
Metering device (restrictor)
Evaporator

14. In a sealed system - as the pressure increases...
The temperature increases
The contactor coil
To prevent condensation from forming
The accumulator

15. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
The contactor coil
Metering device (restrictor)
The coil is precharged with nitrogen
Near a return-air grill

16. Which part of the system stores refrigerant until it is needed in the evaporator...
Metering device (restrictor)
The receiver
Precharged refrigeration linesets
Evaporator

17. An auxiliary drain pan must...

18. Which part of the system prevents liquid from entering the compressor...
The accumulator
Compressor
Evaporator
The temperature increases

19. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Metering device (restrictor)
The suction line must be pitched toward the condensing unit
Must be coiled horizontally and the vapor must flow from top to bottom
Condenser

20. Residential split-system outdoor condensing units are commonly wired with a...
The heating control circuit
Check for tight connections at electrical terminals
208-volt/240-volt single-phase power supply
The contactor coil

21. What is the 'Y' terminal used for on the thermostat...
The cooling contactor coil
A TXV
The temperature increases
208-volt/240-volt single-phase power supply

22. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Metering device (restrictor)
Capillary action
The heating control circuit
Compressor

23. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The cooling contactor coil
Precharged refrigeration linesets
The coil is precharged with nitrogen

24. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Insulated
Have a minimum perimeter of 3' larger than the unit being served
Condenser
Refrigerant must be added to the system

25. What is the 'G' terminal used for on the thermostat...
The suction line must be pitched toward the condensing unit
Metering device
The blower relay coil
Compressor

26. In a sealed system - as the pressure increases...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The temperature increases
Must be coiled horizontally and the vapor must flow from top to bottom
The coil is precharged with nitrogen

27. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
Metering device (restrictor)
Must be coiled horizontally and the vapor must flow from top to bottom
To prevent condensation from forming
A TXV

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

29. To ensure proper oil return to the compressor - when installing a refrigeration line set...
Metering device
A TXV
Capillary action
The suction line must be pitched toward the condensing unit

30. What is the secondary voltage on a step-down control transformer for a residential furnace...
Compressor
24 volts
Refrigerant must be added to the system
Check for tight connections at electrical terminals

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

32. A secondary drain line...
Have a minimum perimeter of 3' larger than the unit being served
Precharged refrigeration linesets
The power from the transformer
Must be located in a conspicuous place to serve as an alarm

33. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
The blower relay coil
The suction line must be pitched toward the condensing unit
A compression fitting
Evaporator

34. If ductwork is located in an attic or crawl space - it must be...
The accumulator
Insulated
Check for tight connections at electrical terminals
208-volt/240-volt single-phase power supply

35. To ensure proper oil return to the compressor - when installing a refrigeration line set...
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
The suction line must be pitched toward the condensing unit
Compressor

36. What type of fitting uses an O-ring to help seal its joint...
Capillary action
Condenser
24 volts
A compression fitting

37. When installing a refrigeration line set through a masonry wall
The lines must be covered by PVC to prevent contact with the masonry material
The temperature increases
Evaporator
This will prevent settling of the ground - which can cause refrigerant line damage

38. 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 heating control circuit
Compressor
Metering device
Refrigerant must be added to the system

39. Which part of the system prevents liquid from entering the compressor...
The accumulator
The heating control circuit
The blower relay coil
The lines must be covered by PVC to prevent contact with the masonry material

40. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Condenser
Have a minimum perimeter of 3' larger than the unit being served
Compressor
The contactor coil

41. A split-system air conditioning unit has...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Compressor
Insulated
Compressor

42. Why is it recommended to add a gravel fill under the pad of a condensing unit...
Near a return-air grill
This will prevent settling of the ground - which can cause refrigerant line damage
Capillary action
The receiver

43. What is the purpose for insulating a suction line...
To prevent condensation from forming
The heating control circuit
Insulated
A compression fitting

44. A split-system air conditioning unit has...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
To prevent condensation from forming
A compression fitting
Check for tight connections at electrical terminals

45. What is the 'are' terminal used for on the thermostat...
Refrigerant must be added to the system
The heating control circuit
Evaporator
The power from the transformer

46. Quick-connect fittings are commonly used on...
The heating control circuit
The suction line must be pitched toward the condensing unit
Precharged refrigeration linesets
Near a return-air grill

47. What is the purpose for insulating a suction line...
Must be coiled horizontally and the vapor must flow from top to bottom
Compressor
The blower relay coil
To prevent condensation from forming

48. What is the 'W' terminal used for on the thermostat...
Evaporator
Have a minimum perimeter of 3' larger than the unit being served
Metering device (restrictor)
The heating control circuit

49. Which part of the system stores refrigerant until it is needed in the evaporator...
The receiver
24 volts
Have a minimum perimeter of 3' larger than the unit being served
To prevent condensation from forming

50. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Capillary action
The accumulator
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Must be coiled horizontally and the vapor must flow from top to bottom