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






2. Where do you apply flux when soldering?






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






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






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






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






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






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






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






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






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






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






13. How are round ducts connected to one another?






14. How do you calculate cfm?

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






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






17. How is ACR tubing sized?






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






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






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






21. 9' round duct has a ballpark cfm of what?






22. What are the two functions of the air-conditioning system?






23. 10 SEER is classified as what kind of efficiency?






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






25. How many amps can 8 g wire handle?






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






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






28. Can refrigerant line sets be altered in length?






29. How is nominal-sized tubing sized?






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






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






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






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






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






35. How are round ducts connected to one another?






36. How will too much refrigerant effect superheat?






37. Superheat should never be below how many degrees






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






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






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






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






42. Multiple-zone systems often use what to alleviate the problem of excess air when only some zones are calling for conditioning?






43. 10' round duct has a ballpark cfm of what?






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






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






46. What is considered normal operating conditions?






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






48. What percentage silver do you need to use for an are-410 system?






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






50. How are high-efficiency condenser coils different from standard-efficiency condenser coils?