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. A reciprocating compressor has what sort of moving parts?






2. At what temperature will brazing melt?






3. How many cfm per ton?






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






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






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






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






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






9. 13 SEER is classified as what kind of efficiency?






10. Will a dirty condenser cause a rise or fall in pressure?






11. When do you install an auxillary drain pan?






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






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






14. On what terminal do you check amperage?






15. How do you calculate ballpark superheat?






16. What is considered normal operating conditions?






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






18. How is ACR tubing sized?






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






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






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






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






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






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






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






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






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

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28. What distributes supply air to a room in a structure?






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






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






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






32. What is the normal evaporator temperature?






33. How are round ducts supported?

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34. Where do you apply flux when soldering?






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






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






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






38. 8' round duct has a ballpark cfm of what?






39. 7' round duct has a ballpark cfm of what?






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






41. What is a package unit?






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






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






44. How will too much refrigerant effect subcooling?






45. How do you achieve high-efficiency?






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






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






48. How will too much refrigerant effect superheat?






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






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