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 is flexible duct supported?






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






3. 6' round duct has a ballpark cfm of what?






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






5. How will too much refrigerant effect superheat?






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






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






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






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






10. How is ACR tubing sized?






11. The furnace size is calculated by what?






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






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






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






15. How many amps can 10 g wire handle?






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






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






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






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






20. How do you calculate cfm?

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21. Where do you apply flux when soldering?






22. How is insulation around a duct rated?






23. How do you calculate cfm?

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24. At what temperature will soft solder melt?






25. Can refrigerant line sets be altered in length?






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






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






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






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






30. The furnace size is calculated by what?






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






32. What are the two types of package units?






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






34. How are round ducts supported?

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






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






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






38. How do you calculate EER?






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






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






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






42. How many BTU's per ton?






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






44. 9' round duct has a ballpark cfm of what?






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






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






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






48. How many amps can 10 g wire handle?






49. What do you do after you braze a system?






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