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. 10' round duct has a ballpark cfm of what?






2. What do you use to check for leaks?






3. How do you calculate LRA?






4. How will too much refrigerant effect superheat?






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






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






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






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






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






10. How many cfm per ton?






11. Where do you install a trap on a drain line?






12. How does ACR copper pipe come?






13. 10' round duct has a ballpark cfm of what?






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






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






16. What do you do after you braze a system?






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






18. What percentage silver do you use to braze two dissimilar metals such as steel and copper?






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






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






21. At what temperature will soft solder melt?






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






23. When do you install an auxillary drain pan?






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






25. How do you calculate ballpark superheat?






26. On what terminal do you check amperage?






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






28. Why is it necessary to have multiple refrigerant circuits in some evaporator coils?






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






30. How is flexible duct supported?






31. How are round ducts supported?

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32. How do you calculate cfm?

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






34. What is considered normal operating conditions?






35. Most duct insulation is made of what?






36. How is nominal-sized tubing sized?






37. How is ACR tubing sized?






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






39. Pressure in ductwork is measured In what?






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






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






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






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






44. What kind of metering device do high-efficiency units usually use?






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






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






47. How do you calculate ballpark superheat?






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






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






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