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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 split-system air conditioning unit has...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
A TXV
The blower relay coil
The power from the transformer

2. Which part of the system prevents liquid from entering the compressor...
Evaporator
The accumulator
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

3. What is the secondary voltage on a step-down control transformer for a residential furnace...
24 volts
Condenser
Metering device (restrictor)
Condenser

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

5. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Metering device (restrictor)
The contactor coil
The temperature increases
This will prevent settling of the ground - which can cause refrigerant line damage

6. What is the 'W' terminal used for on the thermostat...
The heating control circuit
Compressor
Compressor
Refrigerant must be added to the system

7. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Must be located in a conspicuous place to serve as an alarm
Capillary action
Metering device
The coil is precharged with nitrogen

8. An auxiliary drain pan must...

9. A room thermostat should be mounted...
The coil is precharged with nitrogen
The contactor coil
208-volt/240-volt single-phase power supply
Near a return-air grill

10. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
Must be coiled horizontally and the vapor must flow from top to bottom
Have a minimum perimeter of 3' larger than the unit being served
The heating control circuit
Evaporator

11. Residential split-system outdoor condensing units are commonly wired with a...
Near a return-air grill
208-volt/240-volt single-phase power supply
Have a minimum perimeter of 3' larger than the unit being served
The accumulator

12. Before energizing a newly installed system - what test should always be done...
Evaporator
Check for tight connections at electrical terminals
The power from the transformer
The receiver

13. A secondary drain line...
Have a minimum perimeter of 3' larger than the unit being served
Evaporator
Must be located in a conspicuous place to serve as an alarm
Compressor

14. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The contactor coil
Metering device (restrictor)
The cooling contactor coil
Precharged refrigeration linesets

15. What is the purpose for insulating a suction line...
To prevent condensation from forming
The lines must be covered by PVC to prevent contact with the masonry material
The heating control circuit
The contactor coil

16. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
208-volt/240-volt single-phase power supply
Refrigerant must be added to the system
208-volt/240-volt single-phase power supply
Capillary action

17. When installing a refrigeration line set through a masonry wall
208-volt/240-volt single-phase power supply
Must be coiled horizontally and the vapor must flow from top to bottom
Compressor
The lines must be covered by PVC to prevent contact with the masonry material

18. What is the 'Y' terminal used for on the thermostat...
Metering device (restrictor)
The cooling contactor coil
A compression fitting
Must be located in a conspicuous place to serve as an alarm

19. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
The coil is precharged with nitrogen
Evaporator
Compressor
Must be located in a conspicuous place to serve as an alarm

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

21. What is the 'are' terminal used for on the thermostat...
Insulated
Compressor
Must be coiled horizontally and the vapor must flow from top to bottom
The power from the transformer

22. What type of metering device is used on a 12 SEER split air conditioning system...
Check for tight connections at electrical terminals
The temperature increases
A TXV
Condenser

23. What type of metering device is used on a 12 SEER split air conditioning system...
This will prevent settling of the ground - which can cause refrigerant line damage
Compressor
A TXV
The heating control circuit

24. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Insulated
Compressor
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Evaporator

25. Why is it recommended to add a gravel fill under the pad of a condensing unit...
This will prevent settling of the ground - which can cause refrigerant line damage
The accumulator
Must be coiled horizontally and the vapor must flow from top to bottom
Insulated

26. A room thermostat should be mounted...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The contactor coil
Near a return-air grill
The suction line must be pitched toward the condensing unit

27. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
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
Metering device (restrictor)
The cooling contactor coil

28. An auxiliary drain pan must...

29. 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 compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Compressor
The heating control circuit

30. Quick-connect fittings are commonly used on...
The temperature increases
Evaporator
Precharged refrigeration linesets
To prevent condensation from forming

31. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
This will prevent settling of the ground - which can cause refrigerant line damage
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Metering device (restrictor)
Must be coiled horizontally and the vapor must flow from top to bottom

32. If ductwork is located in an attic or crawl space - it must be...
Insulated
The blower relay coil
This will prevent settling of the ground - which can cause refrigerant line damage
Check for tight connections at electrical terminals

33. Which part of the system stores refrigerant until it is needed in the evaporator...
The cooling contactor coil
The receiver
A TXV
To prevent condensation from forming

34. In a sealed system - as the pressure increases...
Metering device (restrictor)
The cooling contactor coil
The receiver
The temperature increases

35. What is the secondary voltage on a step-down control transformer for a residential furnace...
A TXV
Capillary action
24 volts
The blower relay coil

36. What is the 'G' terminal used for on the thermostat...
The blower relay coil
To prevent condensation from forming
The heating control circuit
Evaporator

37. A split-system air conditioning unit has...
The coil is precharged with nitrogen
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
Have a minimum perimeter of 3' larger than the unit being served

38. What type of fitting uses an O-ring to help seal its joint...
Condenser
A compression fitting
The heating control circuit
Must be located in a conspicuous place to serve as an alarm

39. Residential split-system outdoor condensing units are commonly wired with a...
Must be located in a conspicuous place to serve as an alarm
208-volt/240-volt single-phase power supply
Capillary action
The power from the transformer

40. Before energizing a newly installed system - what test should always be done...
Check for tight connections at electrical terminals
The suction line must be pitched toward the condensing unit
24 volts
The heating control circuit

41. What is the 'Y' terminal used for on the thermostat...
Metering device
The cooling contactor coil
This will prevent settling of the ground - which can cause refrigerant line damage
The temperature increases

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

43. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
Condenser
The accumulator
The coil is precharged with nitrogen
The receiver

44. What type of fitting uses an O-ring to help seal its joint...
Metering device
A compression fitting
Condenser
The blower relay coil

45. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Condenser
The receiver
Near a return-air grill
Metering device

46. What is the 'G' terminal used for on the thermostat...
The blower relay coil
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
Metering device (restrictor)

47. What must be done to the system when a condensing unit is precharged for 25' of refrigerant line and uses 32' of refrigerant line...
Near a return-air grill
The lines must be covered by PVC to prevent contact with the masonry material
Refrigerant must be added to the system
24 volts

48. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
Check for tight connections at electrical terminals
A compression fitting
Capillary action
The contactor coil

49. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Compressor
Insulated
To prevent condensation from forming
The accumulator

50. A secondary drain line...
Compressor
Must be located in a conspicuous place to serve as an alarm
Have a minimum perimeter of 3' larger than the unit being served
Compressor