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






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






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






4. What distributes supply air to a room in a structure?






5. How do you calculate LRA?






6. What is considered normal operating conditions?






7. Why are some ACR tubing lines insulated?






8. The crankcase heater on an air-conditioning compressor is used to what?






9. Square sheet metal duct is normally fabricated in a sheet metal shop and assembled in the field. (True or False)






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






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






12. What is lined duct?






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






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






15. What are the two types of package units?






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






17. At what temperature will brazing melt?






18. At what temperature will soft solder melt?






19. How is nominal-sized tubing sized?






20. How much superheat do you need to prevent liquid refrigerant from entering the compressor?






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






22. How are round ducts connected to one another?






23. On what terminal do you check amperage?






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






25. What are normal conditions - as defined by the ARI.






26. Superheat should never be below how many degrees






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






28. What is the normal evaporator temperature?






29. Which is more efficient - a TXV or a fixed-orifice metering device?






30. What are the three ways a motor can fail electrically?






31. At what temperature will soft solder melt?






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






33. What is lined duct?






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






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

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






37. What are the two types of return air systems in residential installations?






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






39. How is flexible duct supported?






40. What kind of refrigeratnts must be added in liquid form?






41. Sections of duct board can be fastened together with what?






42. 10 SEER is classified as what kind of efficiency?






43. What are the two types of blower drives?






44. What is a package unit?






45. How do you calculate the area of a circle?






46. What are the two basic duct connection configurations for package units supply and return air ducts?






47. Can refrigerant line sets be altered in length?






48. What component changes refrigerant from a low pressure gas to a high pressure gas?






49. How are round ducts supported?

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50. How many amps can 12 g wire handle?







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