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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...
208-volt/240-volt single-phase power supply
The suction line must be pitched toward the condensing unit
The power from the transformer
Check for tight connections at electrical terminals

2. What is the 'are' terminal used for on the thermostat...
Evaporator
To prevent condensation from forming
The power from the transformer
Evaporator

3. What type of fitting uses an O-ring to help seal its joint...
The temperature increases
A compression fitting
Compressor
Metering device

4. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Near a return-air grill
The blower relay coil
Must be located in a conspicuous place to serve as an alarm
Metering device (restrictor)

5. In a sealed system - as the pressure increases...
Have a minimum perimeter of 3' larger than the unit being served
The temperature increases
Precharged refrigeration linesets
Compressor

6. If ductwork is located in an attic or crawl space - it must be...
Evaporator
Insulated
The suction line must be pitched toward the condensing unit
The cooling contactor coil

7. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
Insulated
208-volt/240-volt single-phase power supply
The suction line must be pitched toward the condensing unit
The contactor coil

8. What is the secondary voltage on a step-down control transformer for a residential furnace...
Precharged refrigeration linesets
24 volts
Have a minimum perimeter of 3' larger than the unit being served
To prevent condensation from forming

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

10. In a sealed system - as the pressure increases...
The temperature increases
The accumulator
The suction line must be pitched toward the condensing unit
This will prevent settling of the ground - which can cause refrigerant line damage

11. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
The accumulator
A compression fitting
Condenser
Compressor

12. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Capillary action
Evaporator
Near a return-air grill
Condenser

13. What is the 'are' terminal used for on the thermostat...
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
The power from the transformer

14. Which part of the system stores refrigerant until it is needed in the evaporator...
The temperature increases
24 volts
The receiver
A TXV

15. An auxiliary drain pan must...

16. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
The coil is precharged with nitrogen
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Condenser
Compressor

17. What type of fitting uses an O-ring to help seal its joint...
The coil is precharged with nitrogen
The heating control circuit
To prevent condensation from forming
A compression fitting

18. A secondary drain line...
Condenser
Check for tight connections at electrical terminals
Must be located in a conspicuous place to serve as an alarm
The accumulator

19. What type of metering device is used on a 12 SEER split air conditioning system...
A TXV
Capillary action
The power from the transformer
Metering device (restrictor)

20. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
The power from the transformer
A compression fitting
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Condenser

21. 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
The suction line must be pitched toward the condensing unit
208-volt/240-volt single-phase power supply
The blower relay coil

22. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
Condenser
Must be coiled horizontally and the vapor must flow from top to bottom
Capillary action
The power from the transformer

23. What is the secondary voltage on a step-down control transformer for a residential furnace...
Metering device (restrictor)
Insulated
208-volt/240-volt single-phase power supply
24 volts

24. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Capillary action
The temperature increases
208-volt/240-volt single-phase power supply
Must be coiled horizontally and the vapor must flow from top to bottom

25. 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
208-volt/240-volt single-phase power supply
The coil is precharged with nitrogen

26. What is the 'G' terminal used for on the thermostat...
Capillary action
The blower relay coil
Compressor
The heating control circuit

27. Quick-connect fittings are commonly used on...
Must be located in a conspicuous place to serve as an alarm
Evaporator
Condenser
Precharged refrigeration linesets

28. Before energizing a newly installed system - what test should always be done...
The lines must be covered by PVC to prevent contact with the masonry material
Check for tight connections at electrical terminals
Must be coiled horizontally and the vapor must flow from top to bottom
The suction line must be pitched toward the condensing unit

29. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Refrigerant must be added to the system
Metering device
The coil is precharged with nitrogen
Compressor

30. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The contactor coil
The lines must be covered by PVC to prevent contact with the masonry material
Check for tight connections at electrical terminals
Metering device

31. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Must be located in a conspicuous place to serve as an alarm
The contactor coil
Condenser
Compressor

32. To ensure proper oil return to the compressor - when installing a refrigeration line set...
Evaporator
Check for tight connections at electrical terminals
The suction line must be pitched toward the condensing unit
The cooling contactor coil

33. A room thermostat should be mounted...
Have a minimum perimeter of 3' larger than the unit being served
Check for tight connections at electrical terminals
The cooling contactor coil
Near a return-air grill

34. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
Have a minimum perimeter of 3' larger than the unit being served
Near a return-air grill
Must be located in a conspicuous place to serve as an alarm
Evaporator

35. 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
Evaporator
Condenser

36. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
The heating control circuit
Compressor
The blower relay coil
The coil is precharged with nitrogen

37. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Metering device (restrictor)
Refrigerant must be added to the system
Compressor
Insulated

38. Quick-connect fittings are commonly used on...
208-volt/240-volt single-phase power supply
Must be coiled horizontally and the vapor must flow from top to bottom
Insulated
Precharged refrigeration linesets

39. If ductwork is located in an attic or crawl space - it must be...
Insulated
Evaporator
The blower relay coil
Compressor

40. Residential split-system outdoor condensing units are commonly wired with a...
208-volt/240-volt single-phase power supply
Condenser
Check for tight connections at electrical terminals
The power from the transformer

41. 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
Near a return-air grill
A compression fitting
Compressor

42. What is the purpose for insulating a suction line...
Capillary action
Compressor
To prevent condensation from forming
A compression fitting

43. A split-system air conditioning unit has...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The temperature increases
The accumulator
Near a return-air grill

44. An auxiliary drain pan must...

45. When installing a refrigeration line set through a masonry wall
This will prevent settling of the ground - which can cause refrigerant line damage
Metering device (restrictor)
The lines must be covered by PVC to prevent contact with the masonry material
The suction line must be pitched toward the condensing unit

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

47. A room thermostat should be mounted...
The power from the transformer
Near a return-air grill
Metering device (restrictor)
Refrigerant must be added to the system

48. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
The cooling contactor coil
The blower relay coil
Evaporator
The contactor coil

49. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Metering device (restrictor)
The blower relay coil
Evaporator
Evaporator

50. What is the 'Y' terminal used for on the thermostat...
The cooling contactor coil
Compressor
The temperature increases
Must be coiled horizontally and the vapor must flow from top to bottom