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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 must be done to the system when a condensing unit is precharged for 25' of refrigerant line and uses 32' of refrigerant line...
Check for tight connections at electrical terminals
Condenser
Refrigerant must be added to the system
208-volt/240-volt single-phase power supply

2. What must be done to the system when a condensing unit is precharged for 25' of refrigerant line and uses 32' of refrigerant line...
A compression fitting
Refrigerant must be added to the system
A compression fitting
The temperature increases

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

4. When installing a refrigeration line set through a masonry wall
The coil is precharged with nitrogen
The lines must be covered by PVC to prevent contact with the masonry material
Insulated
208-volt/240-volt single-phase power supply

5. Why is it recommended to add a gravel fill under the pad of a condensing unit...
The lines must be covered by PVC to prevent contact with the masonry material
The accumulator
Condenser
This will prevent settling of the ground - which can cause refrigerant line damage

6. A secondary drain line...
Evaporator
Must be located in a conspicuous place to serve as an alarm
A compression fitting
The temperature increases

7. What is the 'Y' terminal used for on the thermostat...
Must be located in a conspicuous place to serve as an alarm
The cooling contactor coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The accumulator

8. What type of fitting uses an O-ring to help seal its joint...
Have a minimum perimeter of 3' larger than the unit being served
A TXV
A compression fitting
The power from the transformer

9. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
Insulated
The coil is precharged with nitrogen
Compressor
24 volts

10. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
208-volt/240-volt single-phase power supply
Metering device
The temperature increases
The coil is precharged with nitrogen

11. What is the purpose for insulating a suction line...
The accumulator
Check for tight connections at electrical terminals
To prevent condensation from forming
Condenser

12. What is the secondary voltage on a step-down control transformer for a residential furnace...
24 volts
A compression fitting
Compressor
The power from the transformer

13. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Metering device
Insulated
Condenser
Metering device (restrictor)

14. Why is it recommended to add a gravel fill under the pad of a condensing unit...
The accumulator
208-volt/240-volt single-phase power supply
This will prevent settling of the ground - which can cause refrigerant line damage
The cooling contactor coil

15. Which part of the system prevents liquid from entering the compressor...
A compression fitting
Condenser
The accumulator
The power from the transformer

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

17. What is the 'W' terminal used for on the thermostat...
The lines must be covered by PVC to prevent contact with the masonry material
The accumulator
The heating control circuit
Metering device (restrictor)

18. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
The power from the transformer
Have a minimum perimeter of 3' larger than the unit being served
A compression fitting
Condenser

19. What is the 'Y' terminal used for on the thermostat...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The cooling contactor coil
Refrigerant must be added to the system
The contactor coil

20. Before energizing a newly installed system - what test should always be done...
Check for tight connections at electrical terminals
To prevent condensation from forming
24 volts
The heating control circuit

21. An auxiliary drain pan must...

22. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Have a minimum perimeter of 3' larger than the unit being served
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The suction line must be pitched toward the condensing unit
Compressor

23. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Insulated
Compressor
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

24. If ductwork is located in an attic or crawl space - it must be...
The temperature increases
Insulated
The receiver
Evaporator

25. Quick-connect fittings are commonly used on...
Metering device (restrictor)
The power from the transformer
Precharged refrigeration linesets
Capillary action

26. If ductwork is located in an attic or crawl space - it must be...
Must be coiled horizontally and the vapor must flow from top to bottom
The temperature increases
Insulated
Near a return-air grill

27. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
The suction line must be pitched toward the condensing unit
Evaporator
The receiver
The suction line must be pitched toward the condensing unit

28. What is the 'W' terminal used for on the thermostat...
Metering device (restrictor)
Compressor
The heating control circuit
The lines must be covered by PVC to prevent contact with the masonry material

29. Residential split-system outdoor condensing units are commonly wired with a...
208-volt/240-volt single-phase power supply
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The lines must be covered by PVC to prevent contact with the masonry material
The cooling contactor coil

30. 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 contactor coil
Capillary action
Condenser

31. 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
The contactor coil
A TXV
The lines must be covered by PVC to prevent contact with the masonry material

32. What is the secondary voltage on a step-down control transformer for a residential furnace...
208-volt/240-volt single-phase power supply
Evaporator
208-volt/240-volt single-phase power supply
24 volts

33. A secondary drain line...
Must be coiled horizontally and the vapor must flow from top to bottom
The blower relay coil
Condenser
Must be located in a conspicuous place to serve as an alarm

34. What is the purpose for insulating a suction line...
Have a minimum perimeter of 3' larger than the unit being served
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The receiver
To prevent condensation from forming

35. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
The accumulator
Must be located in a conspicuous place to serve as an alarm
Capillary action
The contactor coil

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

37. In a sealed system - as the pressure increases...
The temperature increases
This will prevent settling of the ground - which can cause refrigerant line damage
This will prevent settling of the ground - which can cause refrigerant line damage
Insulated

38. A split-system air conditioning unit has...
The suction line must be pitched toward the condensing unit
The contactor coil
Have a minimum perimeter of 3' larger than the unit being served
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

39. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
Condenser
The accumulator
Refrigerant must be added to the system
The contactor coil

40. A room thermostat should be mounted...
The contactor coil
The lines must be covered by PVC to prevent contact with the masonry material
Near a return-air grill
The accumulator

41. What is the 'G' terminal used for on the thermostat...
The blower relay coil
Have a minimum perimeter of 3' larger than the unit being served
To prevent condensation from forming
Precharged refrigeration linesets

42. Which part of the system stores refrigerant until it is needed in the evaporator...
The receiver
The heating control circuit
Evaporator
The lines must be covered by PVC to prevent contact with the masonry material

43. What type of metering device is used on a 12 SEER split air conditioning system...
A TXV
The temperature increases
The temperature increases
The accumulator

44. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
To prevent condensation from forming
Condenser
Near a return-air grill
Must be coiled horizontally and the vapor must flow from top to bottom

45. An auxiliary drain pan must...

46. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Near a return-air grill
To prevent condensation from forming
This will prevent settling of the ground - which can cause refrigerant line damage
Metering device (restrictor)

47. In a sealed system - as the pressure increases...
The temperature increases
The blower relay coil
Check for tight connections at electrical terminals
Refrigerant must be added to the system

48. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Capillary action
Insulated
Evaporator
Check for tight connections at electrical terminals

49. To ensure proper oil return to the compressor - when installing a refrigeration line set...
Condenser
The temperature increases
The suction line must be pitched toward the condensing unit
A TXV

50. Residential split-system outdoor condensing units are commonly wired with a...
The contactor coil
24 volts
208-volt/240-volt single-phase power supply
The blower relay coil