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 the range for normal superheat and subcooling?






2. What are the two basic duct connection configurations for package units supply and return air ducts?






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






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






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






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






7. How are round ducts supported?


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






9. How are round ducts supported?


10. Where do you apply flux when soldering?






11. How do you calculate LRA?






12. Square sheet metal duct is normally fabricated in a sheet metal shop and assembled in the field. (True or False)






13. How does ACR copper pipe come?






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






15. What gauge is thermostat wire?






16. How will too much refrigerant effect subcooling?






17. How many amps can 8 g wire handle?






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






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






20. How many BTU's per ton?






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






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






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






24. 6' round duct has a ballpark cfm of what?






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






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






27. What is a package unit?






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






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






30. How do you calculate EER?






31. What is the typical pressure differance across a TXV?






32. Where do you install a trap on a drain line?






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






34. How is ACR tubing sized?






35. When do you install an auxillary drain pan?






36. How many amps can 12 g wire handle?






37. What is considered normal operating conditions?






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






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






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






41. The load on the evaporater will effect which pressure?






42. What is the normal evaporator temperature?






43. What is the typical pressure differance across a TXV?






44. What are the two types of package units?






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






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






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






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






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






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