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. At what temperature will soft solder melt?






2. How is insulation around a duct rated?






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






4. Superheat should never be below how many degrees






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






6. Square sheet metal duct is normally fabricated in a sheet metal shop and assembled in the field. (True or False)






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






8. How do you calculate EER?






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






10. How many amps can 8 g wire handle?






11. 13 SEER is classified as what kind of efficiency?






12. How is flexible duct supported?






13. What gauge is thermostat wire?






14. How many amps can 10 g wire handle?






15. 9' round duct has a ballpark cfm of what?






16. At what temperature will soft solder melt?






17. 10 SEER is classified as what kind of efficiency?






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






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






20. What is lined duct?






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






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






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






24. What do you use to check for leaks?






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






26. How will too much refrigerant effect subcooling?






27. 9' round duct has a ballpark cfm of what?






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






29. The fan switch opens at what temperature?






30. Do you need a vent on a push-through evaporator?






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






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






33. How are round ducts supported?

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






35. The fan switch closes at what temperature?






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






37. 10' round duct has a ballpark cfm of what?






38. How many amps can 12 g wire handle?






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






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






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






42. 6' round duct has a ballpark cfm of what?






43. If pressure rises - what happens to the superheat?






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






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






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






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






48. What do you use to check for leaks?






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






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