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 are the three ways a motor can fail electrically?






2. Do you need a trap on a pull-through evaporator?






3. Which is more efficient - a TXV or a fixed-orifice metering device?






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






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






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






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






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






9. How do you calculate LRA?






10. Does a package unit come from the factory pre-charged?






11. How is insulation around a duct rated?






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






13. At what temperature will brazing melt?






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






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






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






17. How many amps can 12 g wire handle?






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






19. At what temperature will soft solder melt?






20. Can refrigerant line sets be altered in length?






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






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






23. What are the two types of package units?






24. What component changes refrigerant from a low pressure gas to a high pressure gas?






25. How is ACR tubing sized?






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






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






28. What kind of metering device do high-efficiency units usually use?






29. What are normal conditions - as defined by the ARI.






30. How many amps can 14 g wire handle?






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






32. How will too much refrigerant effect superheat?






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






34. 10' round duct has a ballpark cfm of what?






35. 7' round duct has a ballpark cfm of what?






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






37. How many BTU's per ton?






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






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






40. How is flexible duct supported?






41. At what temperature does refrigerant condense in a standard-efficiency unit?






42. On what terminal do you check amperage?






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






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






45. The load on the evaporater will effect which pressure?






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






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






48. How does ACR copper pipe come?






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






50. 8' round duct has a ballpark cfm of what?