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






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






3. Most duct insulation is made of what?






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






5. How do you calculate the area of a circle?






6. What are the two types of package units?






7. How are round ducts supported?

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8. The furnace size is calculated by what?






9. What is the normal evaporator temperature?






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






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






12. How many BTU's per ton?






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






14. How will too much refrigerant effect superheat?






15. What is the normal evaporator temperature?






16. Can refrigerant line sets be altered in length?






17. On what terminal do you check amperage?






18. How do you achieve high-efficiency?






19. At what temperature will brazing melt?






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






21. When do you install an auxillary drain pan?






22. What percentage silver do you use to braze two dissimilar metals such as steel and copper?






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






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






25. 8' round duct has a ballpark cfm of what?






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






27. How are round ducts connected to one another?






28. What is considered normal operating conditions?






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






30. 7' round duct has a ballpark cfm of what?






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






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






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






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






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






36. How does ACR copper pipe come?






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






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






39. On what terminal do you check amperage?






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






41. How many amps can 8 g wire handle?






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






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






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






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






46. The furnace size is calculated by what?






47. How are round ducts connected to one another?






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






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






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