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. Superheat should never be below how many degrees






2. What is a package unit?






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






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






5. How do you calculate EER?






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






7. How are round ducts supported?

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






9. When do you install a trap on a drain line?






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






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






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






13. At what temperature will soft solder melt?






14. What is considered normal operating conditions?






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






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

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






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






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






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






22. On what terminal do you check amperage?






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






24. How is insulation around a duct rated?






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






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






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






28. The fan switch closes at what temperature?






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






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






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






32. How do you calculate cfm?

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33. How many amps can 10 g wire handle?






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






35. How do you calculate cfm?

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






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






38. How many cfm per ton?






39. 8' round duct has a ballpark cfm of what?






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






41. Why are some ACR tubing lines insulated?






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






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






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






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






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






47. 10' round duct has a ballpark cfm of what?






48. How is nominal-sized tubing sized?






49. 8' round duct has a ballpark cfm of what?






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