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. How do you calculate LRA?






2. The fan switch opens at what temperature?






3. How are round ducts supported?

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4. 13 SEER is classified as what kind of efficiency?






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






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






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






8. 6' round duct has a ballpark cfm of what?






9. How are round ducts connected to one another?






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






11. The crankcase heater on an air-conditioning compressor is used to what?






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






13. How many amps can 14 g wire handle?






14. 10' round duct has a ballpark cfm of what?






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






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






17. Sections of duct board can be fastened together with what?






18. How many amps can 10 g wire handle?






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






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






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






22. What is used to measure static air pressure in ducts.






23. The fan switch opens at what temperature?






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






25. How will an overcharge affect an air-conditioning system with a fixed-orifice type metering device?






26. What is considered normal operating conditions?






27. If the suction pressure rises - what happens to the head pressure?






28. What are the two types of package units?






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






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






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






32. Where do you check the amps on a motor?






33. What is the normal evaporator temperature?






34. What is a package unit?






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






36. 10' round duct has a ballpark cfm of what?






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






38. Can refrigerant line sets be altered in length?






39. Superheat should never be below how many degrees






40. How many cfm per ton?






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






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






43. How do you achieve high-efficiency?






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






45. What is lined duct?






46. 7' round duct has a ballpark cfm of what?






47. How is ACR tubing sized?






48. What distributes supply air to a room in a structure?






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






50. How are round ducts supported?

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