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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. Why is it recommended to add a gravel fill under the pad of a condensing unit...
Metering device (restrictor)
Must be located in a conspicuous place to serve as an alarm
This will prevent settling of the ground - which can cause refrigerant line damage
Evaporator

2. An auxiliary drain pan must...

3. 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 accumulator
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Insulated

4. Quick-connect fittings are commonly used on...
Metering device
Must be coiled horizontally and the vapor must flow from top to bottom
Evaporator
Precharged refrigeration linesets

5. What must be done to the system when a condensing unit is precharged for 25' of refrigerant line and uses 32' of refrigerant line...
Compressor
Refrigerant must be added to the system
Metering device
The heating control circuit

6. A secondary drain line...
208-volt/240-volt single-phase power supply
Must be located in a conspicuous place to serve as an alarm
The heating control circuit
Check for tight connections at electrical terminals

7. What type of metering device is used on a 12 SEER split air conditioning system...
A TXV
Condenser
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

8. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Compressor
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Near a return-air grill
Capillary action

9. What is the 'G' terminal used for on the thermostat...
24 volts
This will prevent settling of the ground - which can cause refrigerant line damage
The blower relay coil
Have a minimum perimeter of 3' larger than the unit being served

10. What is the purpose for insulating a suction line...
This will prevent settling of the ground - which can cause refrigerant line damage
Insulated
To prevent condensation from forming
The contactor coil

11. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The power from the transformer
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
A TXV
The contactor coil

12. Why is it recommended to add a gravel fill under the pad of a condensing unit...
Condenser
This will prevent settling of the ground - which can cause refrigerant line damage
208-volt/240-volt single-phase power supply
The heating control circuit

13. What is the 'W' terminal used for on the thermostat...
The heating control circuit
Check for tight connections at electrical terminals
Metering device
Condenser

14. What is the secondary voltage on a step-down control transformer for a residential furnace...
24 volts
Must be coiled horizontally and the vapor must flow from top to bottom
To prevent condensation from forming
The blower relay coil

15. A room thermostat should be mounted...
Near a return-air grill
Must be coiled horizontally and the vapor must flow from top to bottom
The blower relay coil
Evaporator

16. In a sealed system - as the pressure increases...
The temperature increases
A compression fitting
Evaporator
The contactor coil

17. Which part of the system stores refrigerant until it is needed in the evaporator...
Metering device
Condenser
The receiver
Must be located in a conspicuous place to serve as an alarm

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

19. Before energizing a newly installed system - what test should always be done...
Insulated
The receiver
Check for tight connections at electrical terminals
24 volts

20. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
Compressor
Have a minimum perimeter of 3' larger than the unit being served
208-volt/240-volt single-phase power supply
Condenser

21. Which part of the system stores refrigerant until it is needed in the evaporator...
The receiver
The accumulator
The lines must be covered by PVC to prevent contact with the masonry material
Precharged refrigeration linesets

22. What is the 'Y' terminal used for on the thermostat...
Refrigerant must be added to the system
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

23. What is the 'G' terminal used for on the thermostat...
The suction line must be pitched toward the condensing unit
Precharged refrigeration linesets
The blower relay coil
Check for tight connections at electrical terminals

24. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
Compressor
Metering device (restrictor)
A compression fitting
Precharged refrigeration linesets

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

26. What is the 'are' terminal used for on the thermostat...
Refrigerant must be added to the system
208-volt/240-volt single-phase power supply
The accumulator
The power from the transformer

27. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
Condenser
To prevent condensation from forming
Have a minimum perimeter of 3' larger than the unit being served
The coil is precharged with nitrogen

28. What type of fitting uses an O-ring to help seal its joint...
Insulated
A compression fitting
208-volt/240-volt single-phase power supply
Must be located in a conspicuous place to serve as an alarm

29. An auxiliary drain pan must...

30. Residential split-system outdoor condensing units are commonly wired with a...
The temperature increases
208-volt/240-volt single-phase power supply
Near a return-air grill
The blower relay coil

31. A secondary drain line...
Evaporator
Metering device
Must be located in a conspicuous place to serve as an alarm
The accumulator

32. Which part of the system prevents liquid from entering the compressor...
Metering device
The accumulator
Capillary action
The heating control circuit

33. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
208-volt/240-volt single-phase power supply
Compressor
The contactor coil
To prevent condensation from forming

34. What is the secondary voltage on a step-down control transformer for a residential furnace...
Check for tight connections at electrical terminals
Capillary action
24 volts
Must be located in a conspicuous place to serve as an alarm

35. What is the 'are' terminal used for on the thermostat...
Condenser
Precharged refrigeration linesets
The power from the transformer
Condenser

36. What is the 'W' terminal used for on the thermostat...
Compressor
The heating control circuit
Have a minimum perimeter of 3' larger than the unit being served
The contactor coil

37. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
Precharged refrigeration linesets
Condenser
Capillary action
Must be coiled horizontally and the vapor must flow from top to bottom

38. What is the 'Y' terminal used for on the thermostat...
Must be coiled horizontally and the vapor must flow from top to bottom
The cooling contactor coil
The coil is precharged with nitrogen
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...
The contactor coil
Insulated
The accumulator
Must be located in a conspicuous place to serve as an alarm

40. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
Metering device
Evaporator
Insulated
The receiver

41. When installing a refrigeration line set through a masonry wall
The lines must be covered by PVC to prevent contact with the masonry material
Metering device (restrictor)
24 volts
Near a return-air grill

42. To ensure proper oil return to the compressor - a coiled refrigeration lineset...
Metering device
Evaporator
The contactor coil
Must be coiled horizontally and the vapor must flow from top to bottom

43. Quick-connect fittings are commonly used on...
The receiver
Condenser
To prevent condensation from forming
Precharged refrigeration linesets

44. What is the purpose for insulating a suction line...
To prevent condensation from forming
Capillary action
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The cooling contactor coil

45. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
The temperature increases
Capillary action
Evaporator
208-volt/240-volt single-phase power supply

46. To ensure proper oil return to the compressor - when installing a refrigeration line set...
24 volts
Near a return-air grill
Metering device
The suction line must be pitched toward the condensing unit

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

48. When installing an evaporator coil - before soldering - the end of the evaporator lines must be opened to the atmosphere because...
Metering device (restrictor)
Must be located in a conspicuous place to serve as an alarm
The coil is precharged with nitrogen
24 volts

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

50. 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
Insulated
Near a return-air grill