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






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






3. What are the two types of package units?






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






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






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






7. At what temperature will brazing melt?






8. How are round ducts supported?

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9. What is the difference between SEER and EER?






10. The furnace size is calculated by what?






11. How much superheat do you need to prevent liquid refrigerant from entering the compressor?






12. If the suction pressure rises - what happens to the head pressure?






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






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






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






16. Where do you apply flux when soldering?






17. The fan switch opens at what temperature?






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






19. What is a package unit?






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






21. 9' round duct has a ballpark cfm of what?






22. 8' round duct has a ballpark cfm of what?






23. How do you calculate LRA?






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






25. Can refrigerant line sets be altered in length?






26. If the suction pressure rises - what happens to the head pressure?






27. 13 SEER is classified as what kind of efficiency?






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






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






30. How do you calculate cfm?

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31. What is the normal evaporator temperature?






32. How is insulation around a duct rated?






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






34. How do you calculate EER?






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






36. Superheat should never be below how many degrees






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






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






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






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






41. How do you calculate ballpark superheat?






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






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






44. How is nominal-sized tubing sized?






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






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






47. 10 SEER is classified as what kind of efficiency?






48. Pressure in ductwork is measured In what?






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






50. Where do you install a trap on a drain line?