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 pull-through evaporator have?






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






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






4. Where do you apply flux when soldering?






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

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






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






8. How are round ducts supported?

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9. At what temperature will soft solder melt?






10. How many amps can 8 g wire handle?






11. How many amps can 10 g wire handle?






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






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






14. How many amps can 8 g wire handle?






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






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






17. What is the design boiling point for most evaporator coils in residential air conditioning?






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






19. Superheat should never be below how many degrees






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

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21. How is flexible duct supported?






22. Where do you apply flux when soldering?






23. How many amps can 12 g wire handle?






24. What gauge is thermostat wire?






25. How is nominal-sized tubing sized?






26. How will too much refrigerant effect subcooling?






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






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






29. What is the difference between SEER and EER?






30. How do you calculate ballpark superheat?






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






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






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






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






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






36. How many BTU's per ton?






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






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






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






40. At what temperature will brazing melt?






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






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






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






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






45. What is considered normal operating conditions?






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






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






48. What is the difference between SEER and EER?






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






50. How does ACR copper pipe come?