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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 secondary drain line...
Must be located in a conspicuous place to serve as an alarm
Near a return-air grill
Evaporator
The suction line must be pitched toward the condensing unit

2. Before energizing a newly installed system - what test should always be done...
Check for tight connections at electrical terminals
To prevent condensation from forming
A compression fitting
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

3. What must be done to the system when a condensing unit is precharged for 25' of refrigerant line and uses 32' of refrigerant line...
Capillary action
Insulated
Refrigerant must be added to the system
The power from the transformer

4. What is the secondary voltage on a step-down control transformer for a residential furnace...
Precharged refrigeration linesets
Capillary action
The suction line must be pitched toward the condensing unit
24 volts

5. What type of metering device is used on a 12 SEER split air conditioning system...
A TXV
This will prevent settling of the ground - which can cause refrigerant line damage
The accumulator
Check for tight connections at electrical terminals

6. Before energizing a newly installed system - what test should always be done...
A compression fitting
The cooling contactor coil
Check for tight connections at electrical terminals
Refrigerant must be added to the system

7. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Must be located in a conspicuous place to serve as an alarm
Precharged refrigeration linesets
Evaporator
The contactor coil

8. In a sealed system - as the pressure increases...
The temperature increases
The heating control circuit
24 volts
Metering device (restrictor)

9. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Insulated
24 volts
The blower relay coil
Capillary action

10. Why is it recommended to add a gravel fill under the pad of a condensing unit...
Evaporator
The cooling contactor coil
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

11. To ensure proper oil return to the compressor - when installing a refrigeration line set...
The heating control circuit
Check for tight connections at electrical terminals
The suction line must be pitched toward the condensing unit
Insulated

12. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
208-volt/240-volt single-phase power supply
The contactor coil
This will prevent settling of the ground - which can cause refrigerant line damage
Check for tight connections at electrical terminals

13. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
The accumulator
Capillary action
Precharged refrigeration linesets
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

14. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Near a return-air grill
Precharged refrigeration linesets
Evaporator

15. What is the purpose for insulating a suction line...
Check for tight connections at electrical terminals
The accumulator
The heating control circuit
To prevent condensation from forming

16. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The power from the transformer
Refrigerant must be added to the system
Evaporator

17. When installing a refrigeration line set through a masonry wall
Evaporator
The lines must be covered by PVC to prevent contact with the masonry material
Evaporator
The accumulator

18. In a sealed system - as the pressure increases...
The temperature increases
The lines must be covered by PVC to prevent contact with the masonry material
Refrigerant must be added to the system
The suction line must be pitched toward the condensing unit

19. 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
Evaporator
208-volt/240-volt single-phase power supply
A compression fitting

20. A room thermostat should be mounted...
Near a return-air grill
Must be located in a conspicuous place to serve as an alarm
The lines must be covered by PVC to prevent contact with the masonry material
Metering device (restrictor)

21. Which part of the system stores refrigerant until it is needed in the evaporator...
Condenser
The receiver
The accumulator
The temperature increases

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

23. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Compressor
Have a minimum perimeter of 3' larger than the unit being served
Insulated
Evaporator

24. Where does the refrigerant change from a high-pressure liquid to a low-pressure liquid...
The heating control circuit
Precharged refrigeration linesets
This will prevent settling of the ground - which can cause refrigerant line damage
Metering device (restrictor)

25. What type of fitting uses an O-ring to help seal its joint...
Insulated
A compression fitting
This will prevent settling of the ground - which can cause refrigerant line damage
Precharged refrigeration linesets

26. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The contactor coil
Compressor
Compressor
To prevent condensation from forming

27. When installing a refrigeration line set through a masonry wall
Near a return-air grill
Compressor
208-volt/240-volt single-phase power supply
The lines must be covered by PVC to prevent contact with the masonry material

28. What type of fitting uses an O-ring to help seal its joint...
Metering device (restrictor)
Condenser
The temperature increases
A compression fitting

29. What is the secondary voltage on a step-down control transformer for a residential furnace...
A compression fitting
The heating control circuit
24 volts
Check for tight connections at electrical terminals

30. 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 blower relay coil
This will prevent settling of the ground - which can cause refrigerant line damage
A compression fitting

31. Which part of the system prevents liquid from entering the compressor...
Condenser
Compressor
The lines must be covered by PVC to prevent contact with the masonry material
The accumulator

32. Which part of the system prevents liquid from entering the compressor...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The contactor coil
The accumulator
Must be coiled horizontally and the vapor must flow from top to bottom

33. Quick-connect fittings are commonly used on...
The coil is precharged with nitrogen
Precharged refrigeration linesets
The cooling contactor coil
Near a return-air grill

34. A split-system air conditioning unit has...
This will prevent settling of the ground - which can cause refrigerant line damage
Evaporator
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
208-volt/240-volt single-phase power supply

35. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
A TXV
A compression fitting
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
Compressor

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

37. To ensure proper oil return to the compressor - when installing a refrigeration line set...
The suction line must be pitched toward the condensing unit
Condenser
Have a minimum perimeter of 3' larger than the unit being served
This will prevent settling of the ground - which can cause refrigerant line damage

38. If ductwork is located in an attic or crawl space - it must be...
This will prevent settling of the ground - which can cause refrigerant line damage
Insulated
The heating control circuit
Condenser

39. What is the 'Y' terminal used for on the thermostat...
A compression fitting
The accumulator
The suction line must be pitched toward the condensing unit
The cooling contactor coil

40. A secondary drain line...
Must be located in a conspicuous place to serve as an alarm
24 volts
The cooling contactor coil
Evaporator

41. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
Near a return-air grill
The contactor coil
Compressor
The lines must be covered by PVC to prevent contact with the masonry material

42. What is the 'G' terminal used for on the thermostat...
Near a return-air grill
The lines must be covered by PVC to prevent contact with the masonry material
The blower relay coil
A compression fitting

43. What is the 'W' terminal used for on the thermostat...
Metering device
Compressor
Evaporator
The heating control circuit

44. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
Metering device
Evaporator
The coil is precharged with nitrogen
Condenser

45. What is the 'are' terminal used for on the thermostat...
A TXV
Check for tight connections at electrical terminals
The blower relay coil
The power from the transformer

46. An auxiliary drain pan must...

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47. 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 cooling contactor coil
Evaporator
Check for tight connections at electrical terminals

48. Quick-connect fittings are commonly used on...
The suction line must be pitched toward the condensing unit
Compressor
Must be coiled horizontally and the vapor must flow from top to bottom
Precharged refrigeration linesets

49. What is the 'W' terminal used for on the thermostat...
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The heating control circuit
Refrigerant must be added to the system
The temperature increases

50. What is the 'G' terminal used for on the thermostat...
The cooling contactor coil
The temperature increases
Have a minimum perimeter of 3' larger than the unit being served
The blower relay coil