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 kind of metering device do high-efficiency units usually use?






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






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






4. How do you calculate EER?






5. How are round ducts supported?

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






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






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






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






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






11. What sort of pressure will a pull-through evaporator have?






12. Most duct insulation is made of what?






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






14. What are normal conditions - as defined by the ARI.






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






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






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






18. What is the normal evaporator temperature?






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






20. What are the two types of package units?






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






22. How will too much refrigerant effect subcooling?






23. Superheat should never be below how many degrees






24. 13 SEER is classified as what kind of efficiency?






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






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






27. 6' round duct has a ballpark cfm of what?






28. How do you calculate cfm?

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29. How do you calculate LRA?






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






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






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






33. How many BTU's per ton?






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






35. How do you calculate cfm?

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36. How is ACR tubing sized?






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






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






39. What is a package unit?






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






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






42. How many amps can 14 g wire handle?






43. What is the normal evaporator temperature?






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






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






46. How is flexible duct supported?






47. What are the two types of package units?






48. How are round ducts connected to one another?






49. What is considered normal operating conditions?






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