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






2. How is nominal-sized tubing sized?






3. What is considered normal operating conditions?






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






5. What is the normal evaporator temperature?






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






7. How are round ducts supported?

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8. How is nominal-sized tubing sized?






9. When do you install an auxillary drain pan?






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






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






12. How do you calculate EER?






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






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






15. How is insulation around a duct rated?






16. What is a package unit?






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






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






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






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






21. How do you calculate ballpark superheat?






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






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






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






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






26. How are round ducts supported?

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27. The fan switch opens at what temperature?






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






29. Superheat should never be below how many degrees






30. What is the difference between SEER and EER?






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

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32. How does ACR copper pipe come?






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






34. What is considered normal operating conditions?






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






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






37. How many amps can 10 g wire handle?






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






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






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






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






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






43. What is lined duct?






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






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






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






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






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






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






50. At what temperature will soft solder melt?