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 major power-consuming devices on an air-conditioning system?






2. How is insulation around a duct rated?






3. 10 SEER is classified as what kind of efficiency?






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






5. Why are some ACR tubing lines insulated?






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






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






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






9. What is it called when liquid refrigerant gets into the compressor?






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






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






12. What sort of pressure will a push-through evaporator have?






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






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






15. Will a dirty condenser cause a rise or fall in pressure?






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






17. How do you calculate ballpark superheat?






18. At what temperature will soft solder melt?






19. 8' round duct has a ballpark cfm of what?






20. How will too much refrigerant effect subcooling?






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






22. What percentage silver do you need to use for an are-410 system?






23. What are the two types of blower drives?






24. How many BTU's per ton?






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






26. How do you calculate EER?






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






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






29. How is insulation around a duct rated?






30. How does ACR copper pipe come?






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






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






33. 7' round duct has a ballpark cfm of what?






34. How will too much refrigerant effect superheat?






35. On what terminal do you check amperage?






36. What can cause a decrease in suction pressure on an air-conditioning system?






37. How do you calculate cfm?

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38. Most duct insulation is made of what?






39. How are round ducts connected to one another?






40. The fan switch opens at what temperature?






41. How is flexible duct supported?






42. What is considered normal operating conditions?






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






44. 6' round duct has a ballpark cfm of what?






45. How many amps can 12 g wire handle?






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






47. How are round ducts supported?

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






49. What gauge is thermostat wire?






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