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. At what temperature will soft solder melt?






3. What is the typical temperature difference between a high-efficiency condenser and the ambient temperature?






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






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






6. How will too much refrigerant effect superheat?






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






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






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






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






11. 7' round duct has a ballpark cfm of what?






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






13. Where do you apply flux when soldering?






14. 10' round duct has a ballpark cfm of what?






15. What is the difference between SEER and EER?






16. What component changes refrigerant from a low pressure gas to a high pressure gas?






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






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






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






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






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






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






23. How many BTU's per ton?






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






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






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






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






28. What component changes refrigerant from a low pressure gas to a high pressure gas?






29. The fan switch closes at what temperature?






30. How many amps can 12 g wire handle?






31. A reciprocating compressor has what sort of moving parts?






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






33. How many amps can 14 g wire handle?






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






35. Can refrigerant line sets be altered in length?






36. How many cfm per ton?






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






38. At what temperature will brazing melt?






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






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






41. What is lined duct?






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






43. How many amps can 12 g wire handle?






44. If the rpm's are 1750 - how many poles does the motor have?






45. The fan switch opens at what temperature?






46. At what temperature will brazing melt?






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






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






49. How is insulation around a duct rated?






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