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






2. A reciprocating compressor has what sort of moving parts?






3. How many amps can 10 g wire handle?






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






5. The fan switch opens at what temperature?






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






7. How do you calculate LRA?






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






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






10. How will too much refrigerant effect subcooling?






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






12. What are the two types of blower drives?






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






14. The fan switch closes at what temperature?






15. Where do you apply flux when soldering?






16. How many amps can 12 g wire handle?






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






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






19. How long should you leave a system off once you kill power before restarting it?






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






21. The furnace size is calculated by what?






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






23. What are the three ways a motor can fail electrically?






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






25. On what terminal do you check amperage?






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






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






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






29. What do you do after you braze a system?






30. How do you calculate ballpark superheat?






31. What is a package unit?






32. How do you calculate EER?






33. How are round ducts supported?

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






35. Most duct insulation is made of what?






36. Pressure in ductwork is measured In what?






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






38. How many cfm per ton?






39. 8' round duct has a ballpark cfm of what?






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






41. What is a package unit?






42. The fan switch opens at what temperature?






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






44. Where do you apply flux when soldering?






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






46. When must a copper joint never be soldered or brazed?






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






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






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






50. How do you achieve high-efficiency?