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






2. When do you install an auxillary drain pan?






3. 13 SEER is classified as what kind of efficiency?






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






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






6. What are the two types of blower drives?






7. If the rpm's are 1050 - how many poles does the motor have?






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






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






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






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






12. How is insulation around a duct rated?






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






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






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






16. 9' round duct has a ballpark cfm of what?






17. What can cause a decrease in suction pressure on an air-conditioning system?






18. How many amps can 14 g wire handle?






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






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






21. 6' round duct has a ballpark cfm of what?






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






23. What is lined duct?






24. What do you use to check for leaks?






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






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






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






28. What do you use to check for leaks?






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






30. Superheat should never be below how many degrees






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






32. What is the normal evaporator temperature?






33. The fan switch closes at what temperature?






34. 10' round duct has a ballpark cfm of what?






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






36. How will too much refrigerant effect superheat?






37. How does ACR copper pipe come?






38. 9' round duct has a ballpark cfm of what?






39. The fan switch opens at what temperature?






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






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






42. Pressure in ductwork is measured In what?






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

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44. What are the two types of package units?






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






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






47. How many amps can 10 g wire handle?






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






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






50. How will too much refrigerant effect subcooling?






Can you answer 50 questions in 15 minutes?



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