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

2. What is the 'G' terminal used for on the thermostat...
The blower relay coil
Condenser
Metering device
The contactor coil

3. In a sealed system - as the pressure increases...
The temperature increases
Insulated
To prevent condensation from forming
Metering device

4. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
The coil is precharged with nitrogen
Condenser
A TXV
208-volt/240-volt single-phase power supply

5. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
The suction line must be pitched toward the condensing unit
Have a minimum perimeter of 3' larger than the unit being served
The suction line must be pitched toward the condensing unit
Condenser

6. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
The coil is precharged with nitrogen
Compressor
A compression fitting
Capillary action

7. Before energizing a newly installed system - what test should always be done...
Compressor
The coil is precharged with nitrogen
208-volt/240-volt single-phase power supply
Check for tight connections at electrical terminals

8. Before energizing a newly installed system - what test should always be done...
Check for tight connections at electrical terminals
Have a minimum perimeter of 3' larger than the unit being served
The suction line must be pitched toward the condensing unit
The cooling contactor coil

9. Why is it recommended to add a gravel fill under the pad of a condensing unit...
The suction line must be pitched toward the condensing unit
The lines must be covered by PVC to prevent contact with the masonry material
This will prevent settling of the ground - which can cause refrigerant line damage
Precharged refrigeration linesets

10. A split-system air conditioning unit has...
The heating control circuit
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Evaporator
24 volts

11. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
Metering device
The contactor coil
Condenser
Near a return-air grill

12. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
The coil is precharged with nitrogen
The lines must be covered by PVC to prevent contact with the masonry material
Evaporator
Have a minimum perimeter of 3' larger than the unit being served

13. What is the 'are' terminal used for on the thermostat...
The power from the transformer
The contactor coil
Near a return-air grill
Evaporator

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

15. What type of fitting uses an O-ring to help seal its joint...
A compression fitting
A TXV
Must be coiled horizontally and the vapor must flow from top to bottom
The receiver

16. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
Insulated
Must be located in a conspicuous place to serve as an alarm
The coil is precharged with nitrogen
The suction line must be pitched toward the condensing unit

17. Which part of the system prevents liquid from entering the compressor...
The coil is precharged with nitrogen
The accumulator
The blower relay coil
A compression fitting

18. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Precharged refrigeration linesets
Compressor
Condenser
Metering device (restrictor)

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

20. What is the 'Y' terminal used for on the thermostat...
The cooling contactor coil
Precharged refrigeration linesets
The blower relay coil
The power from the transformer

21. What type of fitting uses an O-ring to help seal its joint...
Insulated
The lines must be covered by PVC to prevent contact with the masonry material
A compression fitting
The temperature increases

22. What is the purpose for insulating a suction line...
This will prevent settling of the ground - which can cause refrigerant line damage
To prevent condensation from forming
Near a return-air grill
Evaporator

23. What must be done to the system when a condensing unit is precharged for 25' of refrigerant line and uses 32' of refrigerant line...
208-volt/240-volt single-phase power supply
Evaporator
The accumulator
Refrigerant must be added to the system

24. What is the purpose for insulating a suction line...
Must be located in a conspicuous place to serve as an alarm
Metering device
To prevent condensation from forming
208-volt/240-volt single-phase power supply

25. A room thermostat should be mounted...
Have a minimum perimeter of 3' larger than the unit being served
Evaporator
Must be coiled horizontally and the vapor must flow from top to bottom
Near a return-air grill

26. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
Near a return-air grill
The contactor coil
Metering device
208-volt/240-volt single-phase power supply

27. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
24 volts
Condenser
Must be located in a conspicuous place to serve as an alarm
Metering device

28. What type of metering device is used on a 12 SEER split air conditioning system...
A TXV
The coil is precharged with nitrogen
Refrigerant must be added to the system
To prevent condensation from forming

29. What is the secondary voltage on a step-down control transformer for a residential furnace...
24 volts
Must be located in a conspicuous place to serve as an alarm
Condenser
Metering device (restrictor)

30. An auxiliary drain pan must...

31. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The cooling contactor coil
The receiver
The contactor coil
The suction line must be pitched toward the condensing unit

32. What is the 'W' terminal used for on the thermostat...
The heating control circuit
Must be coiled horizontally and the vapor must flow from top to bottom
Must be located in a conspicuous place to serve as an alarm
The suction line must be pitched toward the condensing unit

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

34. Which part of the system stores refrigerant until it is needed in the evaporator...
The receiver
24 volts
24 volts
The power from the transformer

35. In a sealed system - as the pressure increases...
The suction line must be pitched toward the condensing unit
Metering device
Must be located in a conspicuous place to serve as an alarm
The temperature increases

36. If ductwork is located in an attic or crawl space - it must be...
Insulated
Precharged refrigeration linesets
The accumulator
Precharged refrigeration linesets

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
Insulated
24 volts
The contactor coil

38. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
The accumulator
Refrigerant must be added to the system
Evaporator
A TXV

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

40. What is the 'W' terminal used for on the thermostat...
The contactor coil
The heating control circuit
The temperature increases
Capillary action

41. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Evaporator
Have a minimum perimeter of 3' larger than the unit being served
Compressor
The power from the transformer

42. 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 power from the transformer
The receiver
Have a minimum perimeter of 3' larger than the unit being served

43. What is the 'are' terminal used for on the thermostat...
The receiver
The accumulator
208-volt/240-volt single-phase power supply
The power from the transformer

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

45. Quick-connect fittings are commonly used on...
Metering device (restrictor)
The temperature increases
To prevent condensation from forming
Precharged refrigeration linesets

46. To ensure proper oil return to the compressor - when installing a refrigeration line set...
The suction line must be pitched toward the condensing unit
Must be located in a conspicuous place to serve as an alarm
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Have a minimum perimeter of 3' larger than the unit being served

47. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
24 volts
To prevent condensation from forming
The coil is precharged with nitrogen
Must be coiled horizontally and the vapor must flow from top to bottom

48. Residential split-system outdoor condensing units are commonly wired with a...
Must be located in a conspicuous place to serve as an alarm
Have a minimum perimeter of 3' larger than the unit being served
A TXV
208-volt/240-volt single-phase power supply

49. Which part of the system prevents liquid from entering the compressor...
The contactor coil
Compressor
Condenser
The accumulator

50. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
Refrigerant must be added to the system
The cooling contactor coil
24 volts
Evaporator