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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 two types of return air systems in residential installations?






2. Do you need a trap on a push-through evaporator?






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






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






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






6. Most duct insulation is made of what?






7. How will an overcharge affect an air-conditioning system with a fixed-orifice type metering device?






8. How is flexible duct supported?






9. Pressure in ductwork is measured In what?






10. How is flexible duct supported?






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






12. How is nominal-sized tubing sized?






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






14. What is the normal evaporator temperature?






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






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






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






18. The load on the evaporater will effect which pressure?






19. What are the four materials used to make duct?






20. What sort of pressure will a pull-through evaporator have?






21. How is the high pressure switch wired with the low pressure switch?






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






23. Does a package unit come from the factory pre-charged?






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






25. What are the three crafts normally associated with an air-conditioned installation?






26. How will too much refrigerant effect subcooling?






27. How will too much refrigerant effect superheat?






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






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






30. 13 SEER is classified as what kind of efficiency?






31. How are high-efficiency condenser coils different from standard-efficiency condenser coils?






32. The furnace size is calculated by what?






33. In what state is the refrigerant in the compressor?






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






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






36. What is the design boiling point for most evaporator coils in residential air conditioning?






37. How is the high pressure switch wired with the low pressure switch?






38. How does ACR copper pipe come?






39. How is ACR tubing sized?






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






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






42. How many BTU's per ton?






43. 8' round duct has a ballpark cfm of what?






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






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






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






47. What are the four materials used to make duct?






48. Where do you check the amps on a motor?






49. What can cause a decrease in suction pressure on an air-conditioning system?






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






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