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 are the three ways a motor can fail electrically?






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






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






4. How will too much refrigerant effect subcooling?






5. Superheat should never be below how many degrees






6. The evaporator is designed to remove what two types of heat?






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






8. At what temperature will soft solder melt?






9. How do you calculate LRA?






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






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






12. How is nominal-sized tubing sized?






13. 9' round duct has a ballpark cfm of what?






14. When do you install an auxillary drain pan?






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






16. 13 SEER is classified as what kind of efficiency?






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






18. The fan switch opens at what temperature?






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






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






21. What is a package unit?






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






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






24. How many BTU's per ton?






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






26. How do you calculate ballpark superheat?






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






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






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






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






31. How is the high pressure switch wired with the low pressure switch?






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






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






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






35. How is insulation around a duct rated?






36. What is the typical pressure differance across a TXV?






37. What do you use to check for leaks?






38. Which type of wire can handle a higher ampacity?






39. What gauge is thermostat wire?






40. When do you install an auxillary drain pan?






41. How are round ducts supported?

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42. How many amps can 8 g wire handle?






43. How many cfm per ton?






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






45. What is lined duct?






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






47. What are the two types of blower drives?






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






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






50. What is the name of the fitting where the branch line leaves the duct?