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






2. Where do you apply flux when soldering?






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






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






5. When do you install an auxillary drain pan?






6. How many cfm per ton?






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






8. How many cfm per ton?






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






10. How do you achieve high-efficiency?






11. Why are some ACR tubing lines insulated?






12. How do you calculate LRA?






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






14. 7' round duct has a ballpark cfm of what?






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






16. How do you calculate ballpark superheat?






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






18. How is nominal-sized tubing sized?






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






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






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






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






23. How will too much refrigerant effect subcooling?






24. At what temperature will brazing melt?






25. Can refrigerant line sets be altered in length?






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






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






28. How is the high pressure switch wired with the low pressure switch?






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






30. What are the three crafts normally associated with an air-conditioned installation?






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






32. How are round ducts connected to one another?






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






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






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






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






37. What do you use to check for leaks?






38. The fan switch opens at what temperature?






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






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






41. 6' round duct has a ballpark cfm of what?






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

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






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






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






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






47. How will an overcharge affect an air-conditioning system with a fixed-orifice type metering device?






48. Most duct insulation is made of what?






49. When do you install an auxillary drain pan?






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