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Residential Air Conditioning

Subjects : engineering, nate
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 are the three ways a motor can fail electrically?






2. What are the two functions of the air-conditioning system?






3. At what temperature does refrigerant condense in a high-efficiency unit?






4. 6' round duct has a ballpark cfm of what?






5. What kind of copper tubing is used for plumbing and heating applications?






6. The A/C size is calculated by what?






7. Which type of wire can handle a higher ampacity?






8. How many amps can 8 g wire handle?






9. The evaporator is designed to remove what two types of heat?






10. What is it called when liquid refrigerant gets into the compressor?






11. How long should you leave a system off once you kill power before restarting it?






12. Will a dirty condenser cause a rise or fall in pressure?






13. At what temperature does refrigerant condense in a standard-efficiency unit?






14. What is lined duct?






15. What is it called when liquid refrigerant gets into the compressor?






16. What is the range for normal superheat and subcooling?






17. How do you calculate cfm?

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18. At what temperature will brazing melt?






19. How will too much refrigerant effect superheat?






20. The refrigerant within the evaporator will typically boil at what temperature when it is 75 degrees inside with a relative humidity of 50%?






21. What is the typical pressure differance across a TXV?






22. What are the two ways that fresh air enters a structure?






23. Where do you apply flux when soldering?






24. How is ACR tubing sized?






25. What are the three pressures created by moving air in ductwork?






26. What are the two types of package units?






27. Do you need a trap on a pull-through evaporator?






28. Where is insulation used on copper tubing used for air-conditioning?






29. What kind of copper tubing is used for plumbing and heating applications?






30. How is nominal-sized tubing sized?






31. How are the high pressure switch and the low pressure switch wired with the compressor contactor?






32. What is the typical temperature difference between a high-efficiency condenser and the ambient temperature?






33. In what length rolls is soft copper tubing normally available?






34. What percentage silver do you need to use for an are-410 system?






35. How much does a drain line need to drop per foot of length?

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36. What are the three major power-consuming devices on an air-conditioning system?






37. At what temperature will brazing melt?






38. What kind of copper tubing is used for refrigeration or air-conditioning applications?






39. Superheat should never be below how many degrees






40. How are the condenser coils different on a high-efficiency unit?






41. On what terminal do you check amperage?






42. How do you achieve high-efficiency?






43. What are the three pressures created by moving air in ductwork?






44. What type of air conditioning system must be charged using the superheat method?






45. What tool is used to expand the diameter of soft copper tubing






46. How is ACR tubing sized?






47. What is the typical temperature difference between a standard-efficiency condenser and the ambient temperature?






48. What is used to measure static air pressure in ducts.






49. If the rpm's are 750 - how many poles does the motor have?






50. How do you calculate LRA?







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