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






2. 8' round duct has a ballpark cfm of what?






3. When do you install a trap on a drain line?






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






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






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






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






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






9. The crankcase heater on an air-conditioning compressor is used to what?






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






11. How are high-efficiency condenser coils different from standard-efficiency condenser coils?






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






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






14. How many amps can 10 g wire handle?






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






16. Most duct insulation is made of what?






17. How are the condenser coils different on a high-efficiency unit?






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






19. 7' round duct has a ballpark cfm of what?






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






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






22. The fan switch opens at what temperature?






23. 10' round duct has a ballpark cfm of what?






24. What are the two types of package units?






25. 6' round duct has a ballpark cfm of what?






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






27. How are the condenser coils different on a high-efficiency unit?






28. 10 SEER is classified as what kind of efficiency?






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






30. Will a dirty condenser cause a rise or fall in pressure?






31. 8' round duct has a ballpark cfm of what?






32. What standard weight copper tubing is most often used in the heating and air-conditioning industry?






33. What is the normal evaporator temperature?






34. How many amps can 8 g wire handle?






35. What is the normal evaporator temperature?






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






37. What is it called when liquid refrigerant gets into the compressor?






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






39. When do you install an auxillary drain pan?






40. How do you achieve high-efficiency?






41. What are the two types of blower drives?






42. What gauge is thermostat wire?






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






44. Will a dirty condenser cause a rise or fall in pressure?






45. Superheat should never be below how many degrees






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






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






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






49. How do you calculate cfm?

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