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 sort of pressure will a push-through evaporator have?






2. How many amps can 10 g wire handle?






3. The fan switch closes at what temperature?






4. Most duct insulation is made of what?






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






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






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






8. How is flexible duct supported?






9. What is considered normal operating conditions?






10. How do you calculate ballpark superheat?






11. How are round ducts supported?

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






13. Pressure in ductwork is measured In what?






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






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






16. In what state is the refrigerant in the compressor?






17. The A/C size is calculated by what?






18. How many amps can 12 g wire handle?






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






20. The fan switch closes at what temperature?






21. How do you calculate ballpark superheat?






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

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






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






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






26. At what temperature will brazing melt?






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






28. What is considered normal operating conditions?






29. Superheat should never be below how many degrees






30. How many BTU's per ton?






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






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






33. 9' round duct has a ballpark cfm of what?






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






35. At what temperature will soft solder melt?






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






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






38. The refrigerant within the evaporator will typically boil at what temperature when it is 75 degrees inside with a relative humidity of 50%?






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






40. How do you calculate cfm?

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






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






43. What is a package unit?






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






45. How are round ducts connected to one another?






46. How many cfm per ton?






47. The furnace size is calculated by what?






48. What is the normal evaporator temperature?






49. How is insulation around a duct rated?






50. Where do you apply flux when soldering?