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






2. Which type of wire can handle a higher ampacity?






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






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






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






6. How is nominal-sized tubing sized?






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






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






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






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






11. What is the typical temperature difference between a standard-efficiency condenser and the ambient temperature?






12. Can refrigerant line sets be altered in length?






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






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






15. How many amps can 14 g wire handle?






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






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






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






19. The fan switch opens at what temperature?






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






21. How many BTU's per ton?






22. How are round ducts supported?

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23. How many amps can 14 g wire handle?






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






25. How will too much refrigerant effect superheat?






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






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






28. How are round ducts connected to one another?






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






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






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






32. What is a package unit?






33. How many amps can 12 g wire handle?






34. What are the two types of blower drives?






35. The fan switch closes at what temperature?






36. When do you install an auxillary drain pan?






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






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






39. What gauge is thermostat wire?






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






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






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






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






44. At what temperature will brazing melt?






45. How does ACR copper pipe come?






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






47. What can cause a decrease in suction pressure on an air-conditioning system?






48. 6' round duct has a ballpark cfm of what?






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






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