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






2. 10' round duct has a ballpark cfm of what?






3. How do you calculate EER?






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






5. The furnace size is calculated by what?






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






7. At what temperature will brazing melt?






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






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






10. How many amps can 8 g wire handle?






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






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






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






14. Pressure in ductwork is measured In what?






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






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






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






18. Why are some ACR tubing lines insulated?






19. Why is it necessary to have multiple refrigerant circuits in some evaporator coils?






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






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






22. How will too much refrigerant effect superheat?






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






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






25. How many amps can 12 g wire handle?






26. How do you calculate cfm?

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






28. What are the two types of blower drives?






29. How many BTU's per ton?






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






31. How will too much refrigerant effect superheat?






32. 6' round duct has a ballpark cfm of what?






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






34. How will too much refrigerant effect subcooling?






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






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






37. What is the range for normal superheat and subcooling?






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






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






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






41. What is used to measure static air pressure in ducts.






42. How is flexible duct supported?






43. On what terminal do you check amperage?






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






45. 10' round duct has a ballpark cfm of what?






46. How many amps can 14 g wire handle?






47. What is lined duct?






48. The evaporator is designed to remove what two types of heat?






49. How do you calculate ballpark superheat?






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

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