Test your basic knowledge |

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 installing a refrigeration line set through a masonry wall
The lines must be covered by PVC to prevent contact with the masonry material
The receiver
Refrigerant must be added to the system
Condenser

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

3. Before energizing a newly installed system - what test should always be done...
Metering device
Have a minimum perimeter of 3' larger than the unit being served
Check for tight connections at electrical terminals
Condenser

4. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
A compression fitting
Precharged refrigeration linesets
Condenser
This will prevent settling of the ground - which can cause refrigerant line damage

5. A room thermostat should be mounted...
Metering device (restrictor)
Near a return-air grill
Refrigerant must be added to the system
Insulated

6. When soldering a copper connection and solder is drawn into the joint - This is commonly called...
Capillary action
Check for tight connections at electrical terminals
To prevent condensation from forming
The suction line must be pitched toward the condensing unit

7. What is the purpose for insulating a suction line...
The receiver
Must be coiled horizontally and the vapor must flow from top to bottom
To prevent condensation from forming
The heating control circuit

8. The part of an air conditioning system that changes the refrigerant from a low-pressure liquid to a low-pressure gas is the...
The temperature increases
This will prevent settling of the ground - which can cause refrigerant line damage
Evaporator
Precharged refrigeration linesets

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

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

11. If ductwork is located in an attic or crawl space - it must be...
The coil is precharged with nitrogen
The power from the transformer
Insulated
Refrigerant must be added to the system

12. Before energizing a newly installed system - what test should always be done...
Evaporator
Check for tight connections at electrical terminals
This will prevent settling of the ground - which can cause refrigerant line damage
The coil is precharged with nitrogen

13. The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the...
The suction line must be pitched toward the condensing unit
The accumulator
Compressor
The lines must be covered by PVC to prevent contact with the masonry material

14. What type of fitting uses an O-ring to help seal its joint...
The cooling contactor coil
A compression fitting
The accumulator
24 volts

15. 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 suction line must be pitched toward the condensing unit
The blower relay coil

16. Residential split-system outdoor condensing units are commonly wired with a...
The suction line must be pitched toward the condensing unit
208-volt/240-volt single-phase power supply
The lines must be covered by PVC to prevent contact with the masonry material
Compressor

17. 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
Refrigerant must be added to the system
A compression fitting
Capillary action

18. Quick-connect fittings are commonly used on...
Evaporator
The receiver
Capillary action
Precharged refrigeration linesets

19. In a sealed system - as the pressure increases...
The blower relay coil
Precharged refrigeration linesets
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The temperature increases

20. The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the...
The coil is precharged with nitrogen
Condenser
The contactor coil
The receiver

21. A room thermostat should be mounted...
Near a return-air grill
Refrigerant must be added to the system
Must be located in a conspicuous place to serve as an alarm
The receiver

22. Which part of the system stores refrigerant until it is needed in the evaporator...
The receiver
A TXV
To prevent condensation from forming
Capillary action

23. A split-system air conditioning unit has...
Compressor
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
The blower relay coil

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

25. The part of an air conditioning system that changes the refrigerant from a high-pressure liquid to a low-pressure liquid is the...
Have a minimum perimeter of 3' larger than the unit being served
Metering device
Check for tight connections at electrical terminals
The accumulator

26. To ensure proper oil return to the compressor - when installing a refrigeration line set...
The suction line must be pitched toward the condensing unit
To prevent condensation from forming
Capillary action
To prevent condensation from forming

27. What is the 'are' terminal used for on the thermostat...
The power from the transformer
Condenser
The temperature increases
Compressor

28. Where does the refrigerant change from a low-pressure gas to a high-pressure gas...
The heating control circuit
Compressor
Near a return-air grill
Refrigerant must be added to the system

29. To ensure proper oil return to the compressor - when installing a refrigeration line set...
The temperature increases
The accumulator
This will prevent settling of the ground - which can cause refrigerant line damage
The suction line must be pitched toward the condensing unit

30. Which part of the system prevents liquid from entering the compressor...
The accumulator
Capillary action
Compressor
Check for tight connections at electrical terminals

31. Why is it recommended to add a gravel fill under the pad of a condensing unit...
Compressor
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
The contactor coil

32. An auxiliary drain pan must...

33. What is the secondary voltage on a step-down control transformer for a residential furnace...
Evaporator
24 volts
The power from the transformer
Evaporator

34. What is the 'G' terminal used for on the thermostat...
The blower relay coil
To prevent condensation from forming
Evaporator
Condenser

35. What type of metering device is used on a 12 SEER split air conditioning system...
The heating control circuit
Compressor
A TXV
Condenser

36. A normally closed float switch that is connected to an auxiliary drain pan should be wired to control...
The cooling contactor coil
Condenser
The contactor coil
Evaporator

37. Where does the refrigerant change from a high-pressure gas to a high-pressure liquid...
This will prevent settling of the ground - which can cause refrigerant line damage
Condenser
The temperature increases
Evaporator

38. A split-system air conditioning unit has...
The lines must be covered by PVC to prevent contact with the masonry material
The contactor coil
Insulated
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator

39. Why is it recommended to add a gravel fill under the pad of a condensing unit...
The heating control circuit
This will prevent settling of the ground - which can cause refrigerant line damage
Compressor
The cooling contactor coil

40. A secondary drain line...
The coil is precharged with nitrogen
Refrigerant must be added to the system
Must be located in a conspicuous place to serve as an alarm
Have a minimum perimeter of 3' larger than the unit being served

41. Where does the refrigerant change from a low-pressure liquid to a low-pressure gas...
Compressor
Capillary action
The heating control circuit
Evaporator

42. What type of fitting uses an O-ring to help seal its joint...
Condenser
The cooling contactor coil
A compression fitting
The blower relay coil

43. Which part of the system prevents liquid from entering the compressor...
Check for tight connections at electrical terminals
Near a return-air grill
A compression fitting
The accumulator

44. What is the 'W' terminal used for on the thermostat...
A compression fitting
To prevent condensation from forming
The heating control circuit
The contactor coil

45. If ductwork is located in an attic or crawl space - it must be...
Insulated
Evaporator
The coil is precharged with nitrogen
Condenser

46. Quick-connect fittings are commonly used on...
Must be coiled horizontally and the vapor must flow from top to bottom
Precharged refrigeration linesets
Metering device (restrictor)
A TXV

47. An auxiliary drain pan must...

48. 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 accumulator
The heating control circuit
Near a return-air grill

49. In a sealed system - as the pressure increases...
Check for tight connections at electrical terminals
The contactor coil
The compressor and condenser connected by a refrigeration line set to the metering device and evaporator
The temperature increases

50. 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
The lines must be covered by PVC to prevent contact with the masonry material
The heating control circuit
Condenser