Test your basic knowledge |

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 is the typical pressure differance across a TXV?






2. How does ACR copper pipe come?






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






4. Do you need a vent on a pull-through evaporator?






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






6. What do you use to connect square and rectangular ductboard together?






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






8. When do you install a trap on a drain line?






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






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






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






12. 6' round duct has a ballpark cfm of what?






13. What are the two types of blower drives?






14. Pressure in ductwork is measured In what?






15. If the rpm's are 3450 - how many poles does the motor have?






16. How do you calculate ballpark superheat?






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






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

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19. If the rpm's are 1050 - how many poles does the motor have?






20. What is the normal evaporator temperature?






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






22. If pressure rises - what happens to the superheat?






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






24. What is the name of the fitting where the branch line leaves the duct?






25. How do you calculate EER?






26. 8' round duct has a ballpark cfm of what?






27. What standard weight copper tubing is most often used in the heating and air-conditioning industry?






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






29. At what temperature will soft solder melt?






30. What sort of pressure will a push-through evaporator have?






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






32. What are the components of a hard-start kit?






33. The furnace size is calculated by what?






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






35. A reciprocating compressor has what sort of moving parts?






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






37. How is flexible duct supported?






38. If pressure rises - what happens to the superheat?






39. If the rpm's are 1750 - how many poles does the motor have?






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






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






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






43. What is the normal evaporator temperature?






44. How will too much refrigerant effect superheat?






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






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






47. How is insulation around a duct rated?






48. How will too much refrigerant effect subcooling?






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






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