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 difference between SEER and EER?






2. How do you calculate the area of a circle?






3. How will too much refrigerant effect subcooling?






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






5. Why are some ACR tubing lines insulated?






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






7. What is the difference between SEER and EER?






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






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






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






11. The furnace size is calculated by what?






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






13. Can refrigerant line sets be altered in length?






14. Why are some ACR tubing lines insulated?






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






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






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






18. How are round ducts connected to one another?






19. Where do you apply flux when soldering?






20. What is a package unit?






21. How does ACR copper pipe come?






22. Most duct insulation is made of what?






23. How does ACR copper pipe come?






24. 10' round duct has a ballpark cfm of what?






25. What is lined duct?






26. How do you calculate LRA?






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






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






29. How is ACR tubing sized?






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






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






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






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






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






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






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






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






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






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






40. How is insulation around a duct rated?






41. 9' round duct has a ballpark cfm of what?






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






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






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






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






46. What is the normal evaporator temperature?






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






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






49. On what terminal do you check amperage?






50. 10 SEER is classified as what kind of efficiency?