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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. Before energizing a newly installed system - what test should always be done...
This will prevent settling of the ground - which can cause refrigerant line damage
Check for tight connections at electrical terminals
The heating control circuit
Compressor

2. What is the purpose for insulating a suction line...
Check for tight connections at electrical terminals
The cooling contactor coil
To prevent condensation from forming
Must be located in a conspicuous place to serve as an alarm

3. Quick-connect fittings are commonly used on...
The coil is precharged with nitrogen
Precharged refrigeration linesets
Metering device
Evaporator

4. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Metering device
Compressor
Condenser
Compressor

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

6. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Condenser
Refrigerant must be added to the system
Compressor
Have a minimum perimeter of 3' larger than the unit being served

7. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Refrigerant must be added to the system
The cooling contactor coil
Metering device (restrictor)
Compressor

8. A split-system air conditioning unit has...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The receiver
Precharged refrigeration linesets
24 volts

9. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Metering device (restrictor)
A TXV
24 volts
Capillary action

10. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
Metering device
The receiver
The coil is precharged with nitrogen
The heating control circuit

11. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
The suction line must be pitched toward the condensing unit
Near a return-air grill
Compressor
Precharged refrigeration linesets

12. What is the 'Y' terminal used for on the thermostat...
The cooling contactor coil
Refrigerant must be added to the system
Evaporator
Must be coiled horizontally and the vapor must flow from top to bottom

13. What type of metering device is used on a 12 SEER split air conditioning system...
Check for tight connections at electrical terminals
To prevent condensation from forming
Check for tight connections at electrical terminals
A TXV

14. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Must be located in a conspicuous place to serve as an alarm
Metering device (restrictor)
The suction line must be pitched toward the condensing unit
Compressor

15. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
The contactor coil
Capillary action
Compressor
Metering device

16. What is the 'Y' terminal used for on the thermostat...
The cooling contactor coil
The power from the transformer
The suction line must be pitched toward the condensing unit
Must be located in a conspicuous place to serve as an alarm

17. A room thermostat should be mounted...
Evaporator
Must be located in a conspicuous place to serve as an alarm
Near a return-air grill
24 volts

18. An auxiliary drain pan must...

19. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
208-volt/240-volt single-phase power supply
The blower relay coil
This will prevent settling of the ground - which can cause refrigerant line damage
Condenser

20. In a sealed system - as the pressure increases...
The lines must be covered by PVC to prevent contact with the masonry material
Capillary action
The temperature increases
Near a return-air grill

21. 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
Capillary action
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

22. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
A compression fitting
The accumulator
Metering device (restrictor)
To prevent condensation from forming

23. Why is it recommended to add a gravel fill under the pad of a condensing unit...
Refrigerant must be added to the system
The contactor coil
Near a return-air grill
This will prevent settling of the ground - which can cause refrigerant line damage

24. 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
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
Metering device (restrictor)

25. What type of metering device is used on a 12 SEER split air conditioning system...
A TXV
Evaporator
Capillary action
Capillary action

26. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
Capillary action
The contactor coil
Metering device (restrictor)
Have a minimum perimeter of 3' larger than the unit being served

27. If ductwork is located in an attic or crawl space - it must be...
Metering device
Insulated
Check for tight connections at electrical terminals
The power from the transformer

28. What is the secondary voltage on a step-down control transformer for a residential furnace...
24 volts
The suction line must be pitched toward the condensing unit
Condenser
The suction line must be pitched toward the condensing unit

29. Residential split-system outdoor condensing units are commonly wired with a...
208-volt/240-volt single-phase power supply
The receiver
Must be coiled horizontally and the vapor must flow from top to bottom
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

30. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
Precharged refrigeration linesets
Must be coiled horizontally and the vapor must flow from top to bottom
Evaporator
The temperature increases

31. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
Evaporator
Must be located in a conspicuous place to serve as an alarm
Check for tight connections at electrical terminals
The accumulator

32. Which part of the system prevents liquid from entering the compressor...
The accumulator
Condenser
Condenser
Must be coiled horizontally and the vapor must flow from top to bottom

33. A room thermostat should be mounted...
Refrigerant must be added to the system
Metering device (restrictor)
Near a return-air grill
The coil is precharged with nitrogen

34. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Precharged refrigeration linesets
24 volts
Evaporator
The blower relay coil

35. A secondary drain line...
Have a minimum perimeter of 3' larger than the unit being served
The cooling contactor coil
Condenser
Must be located in a conspicuous place to serve as an alarm

36. 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
Must be coiled horizontally and the vapor must flow from top to bottom
Compressor
The power from the transformer

37. To ensure proper oil return to the compressor - when installing a refrigeration line set...
The lines must be covered by PVC to prevent contact with the masonry material
A TXV
Metering device
The suction line must be pitched toward the condensing unit

38. What is the 'W' terminal used for on the thermostat...
24 volts
Have a minimum perimeter of 3' larger than the unit being served
The heating control circuit
The temperature increases

39. Quick-connect fittings are commonly used on...
The suction line must be pitched toward the condensing unit
Insulated
Precharged refrigeration linesets
24 volts

40. What type of fitting uses an O-ring to help seal its joint...
The suction line must be pitched toward the condensing unit
Compressor
The accumulator
A compression fitting

41. If ductwork is located in an attic or crawl space - it must be...
Insulated
Near a return-air grill
Metering device
The power from the transformer

42. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
Precharged refrigeration linesets
Evaporator
The suction line must be pitched toward the condensing unit
Condenser

43. 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 accumulator
A compression fitting
This will prevent settling of the ground - which can cause refrigerant line damage

44. 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
The heating control circuit
Compressor
Compressor

45. 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
Compressor
Insulated
Must be coiled horizontally and the vapor must flow from top to bottom

46. What type of fitting uses an O-ring to help seal its joint...
A compression fitting
To prevent condensation from forming
The accumulator
Capillary action

47. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
Evaporator
The contactor coil
Insulated
Precharged refrigeration linesets

48. An auxiliary drain pan must...

49. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Check for tight connections at electrical terminals
Evaporator
24 volts
The receiver

50. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
Evaporator
208-volt/240-volt single-phase power supply
To prevent condensation from forming
Must be coiled horizontally and the vapor must flow from top to bottom