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






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






3. At what temperature will brazing melt?






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






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






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






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






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






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






10. Where do you apply flux when soldering?






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






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






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






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






15. How do you achieve high-efficiency?






16. 7' round duct has a ballpark cfm of what?






17. 10' round duct has a ballpark cfm of what?






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






19. How do you calculate EER?






20. Why are some ACR tubing lines insulated?






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






22. The furnace size is calculated by what?






23. The refrigerant within the evaporator will typically boil at what temperature when it is 75 degrees inside with a relative humidity of 50%?






24. 9' round duct has a ballpark cfm of what?






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






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






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






28. What kind of copper tubing is used for plumbing and heating applications?






29. At what temperature does refrigerant condense in a high-efficiency unit?






30. When do you install an auxillary drain pan?






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






32. 8' round duct has a ballpark cfm of what?






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






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






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






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






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






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






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






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






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






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






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






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






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






46. What gauge is thermostat wire?






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






48. Why are some ACR tubing lines insulated?






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






50. On what terminal do you check amperage?