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






2. The fan switch opens at what temperature?






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






4. Pressure in ductwork is measured In what?






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






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






7. What is lined duct?






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






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






10. 7' round duct has a ballpark cfm of what?






11. What is used to measure static air pressure in ducts.






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






13. Which type of wire can handle a higher ampacity?






14. What is the normal evaporator temperature?






15. What do you use to check for leaks?






16. What is the difference between SEER and EER?






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






18. How do you calculate cfm?

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






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






21. What is the range for normal superheat and subcooling?






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






23. The A/C size is calculated by what?






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






25. 9' round duct has a ballpark cfm of what?






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

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






28. What are the two types of package units?






29. The furnace size is calculated by what?






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






31. Why are some ACR tubing lines insulated?






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






33. What is the typical temperature difference between a standard-efficiency condenser and the ambient temperature?






34. What kind of metering device do high-efficiency units usually use?






35. What are the two types of blower drives?






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






37. How many amps can 10 g wire handle?






38. Can refrigerant line sets be altered in length?






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






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






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

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






43. How is ACR tubing sized?






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






45. At what temperature will brazing melt?






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






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






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






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






50. At what temperature will brazing melt?