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






2. The fan switch opens at what temperature?






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






4. How will too much refrigerant effect superheat?






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






6. How do you achieve high-efficiency?






7. What are the two ways that fresh air enters a structure?






8. How are round ducts connected to one another?






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






10. What is lined duct?






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






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






13. How is ACR tubing sized?






14. If the rpm's are 1750 - how many poles does the motor have?






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






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






17. What is the design boiling point for most evaporator coils in residential air conditioning?






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






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






20. What are the two basic duct connection configurations for package units supply and return air ducts?






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






22. How is flexible duct supported?






23. How is flexible duct supported?






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






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






26. What is the normal evaporator temperature?






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






28. How many BTU's per ton?






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






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






31. Superheat should never be below how many degrees






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






33. How will too much refrigerant effect subcooling?






34. 13 SEER is classified as what kind of efficiency?






35. How do you calculate ballpark superheat?






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






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






38. In what length rolls is soft copper tubing normally available?






39. The fan switch closes at what temperature?






40. In what length rolls is soft copper tubing normally available?






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






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






43. Where do you apply flux when soldering?






44. At what temperature will brazing melt?






45. What are the two types of blower drives?






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






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






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






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






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