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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 tool is used to expand the diameter of soft copper tubing






2. How is nominal-sized tubing sized?






3. What gauge is thermostat wire?






4. The fan switch closes at what temperature?






5. How many amps can 14 g wire handle?






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






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






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






9. The compressor is cooled by liquid refrigerant. (True of False)






10. What is the difference between SEER and EER?






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






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






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






14. How do you calculate cfm?

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






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






17. Can refrigerant line sets be altered in length?






18. 9' round duct has a ballpark cfm of what?






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






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






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






22. How are round ducts supported?

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






24. How many amps can 10 g wire handle?






25. When must a copper joint never be soldered or brazed?






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






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






28. How does ACR copper pipe come?






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






30. How is ACR tubing sized?






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






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






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






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






35. Superheat should never be below how many degrees






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






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






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






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






42. How many cfm per ton?






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






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






45. How are round ducts connected to one another?






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






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






48. How are round ducts connected to one another?






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






50. What are the two ways that fresh air enters a structure?







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