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






3. At what temperature will soft solder melt?






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






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






6. How do you calculate ballpark superheat?






7. 9' round duct has a ballpark cfm of what?






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






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






10. 13 SEER is classified as what kind of efficiency?






11. What is the normal evaporator temperature?






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






13. How many BTU's per ton?






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






15. What are the three pressures created by moving air in ductwork?






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






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






18. On what terminal do you check amperage?






19. How do you calculate LRA?






20. 9' round duct has a ballpark cfm of what?






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






22. Where is insulation used on copper tubing used for air-conditioning?






23. What tool is used to expand the diameter of soft copper tubing






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






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






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






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






28. What gauge is thermostat wire?






29. The furnace size is calculated by what?






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






31. 10' round duct has a ballpark cfm of what?






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






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






34. How many amps can 8 g wire handle?






35. What is the typical temperature difference between a high-efficiency condenser and the ambient temperature?






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






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






38. What do you use to check for leaks?






39. Most duct insulation is made of what?






40. 6' round duct has a ballpark cfm of what?






41. How do you calculate EER?






42. How do you calculate cfm?

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43. How many cfm per ton?






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






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






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






47. The fan switch opens at what temperature?






48. How will too much refrigerant effect subcooling?






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






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