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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. A reciprocating compressor has what sort of moving parts?






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






3. The fan switch opens at what temperature?






4. 6' round duct has a ballpark cfm of what?






5. What is considered normal operating conditions?






6. When do you install an auxillary drain pan?






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






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






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






10. How many amps can 12 g wire handle?






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






12. 10 SEER is classified as what kind of efficiency?






13. How many BTU's per ton?






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






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






16. What are the two types of package units?






17. How many amps can 8 g wire handle?






18. What is lined duct?






19. The fan switch closes at what temperature?






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






21. What is the difference between SEER and EER?






22. How are round ducts supported?

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






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






25. What is the normal evaporator temperature?






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






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






28. 13 SEER is classified as what kind of efficiency?






29. Sections of duct board can be fastened together with what?






30. Where do you apply flux when soldering?






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

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32. How will too much refrigerant effect superheat?






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






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






35. How is insulation around a duct rated?






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






37. Do you need a trap on a push-through evaporator?






38. How is nominal-sized tubing sized?






39. How will too much refrigerant effect subcooling?






40. How will too much refrigerant effect subcooling?






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






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






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






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






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






46. If the suction pressure rises - what happens to the head pressure?






47. At what temperature will soft solder melt?






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






49. How many cfm per ton?






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







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