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 is it called when liquid refrigerant gets into the compressor?






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






3. Superheat should never be below how many degrees






4. What is the difference between SEER and EER?






5. How many amps can 8 g wire handle?






6. How are round ducts supported?

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

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8. Superheat should never be below how many degrees






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






10. How many amps can 14 g wire handle?






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






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






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






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






15. How do you calculate ballpark superheat?






16. How does ACR copper pipe come?






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






18. What are the two types of package units?






19. What is lined duct?






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






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






22. How do you achieve high-efficiency?






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






24. How will too much refrigerant effect subcooling?






25. How is insulation around a duct rated?






26. Why are some ACR tubing lines insulated?






27. Pressure in ductwork is measured In what?






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






29. 10' round duct has a ballpark cfm of what?






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






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






32. 10' round duct has a ballpark cfm of what?






33. The fan switch opens at what temperature?






34. What is the difference between SEER and EER?






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






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






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






38. What do you use to check for leaks?






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






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






41. At what temperature will soft solder melt?






42. Most duct insulation is made of what?






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






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






45. The fan switch closes at what temperature?






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






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






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






49. How do you calculate EER?






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