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. Where do you apply flux when soldering?






2. What kind of copper tubing is used for plumbing and heating applications?






3. Where do you check the amps on a motor?






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






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






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






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






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

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9. What are the two types of blower drives?






10. How many amps can 14 g wire handle?






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






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






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






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






15. In what state is the refrigerant in the compressor?






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






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






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






19. What standard weight copper tubing is most often used in the heating and air-conditioning industry?






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






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






22. How is nominal-sized tubing sized?






23. How is ACR tubing sized?






24. How do you calculate ballpark superheat?






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






26. When do you install an auxillary drain pan?






27. How many cfm per ton?






28. Why are some ACR tubing lines insulated?






29. On what terminal do you check amperage?






30. On what terminal do you check amperage?






31. Can refrigerant line sets be altered in length?






32. What do you use to check for leaks?






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






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






35. How many amps can 10 g wire handle?






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






37. How many amps can 8 g wire handle?






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






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






40. 10' round duct has a ballpark cfm of what?






41. What gauge is thermostat wire?






42. How many amps can 10 g wire handle?






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






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






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






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






47. How will too much refrigerant effect superheat?






48. How are round ducts supported?

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






50. How is flexible duct supported?