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. What gauge is thermostat wire?






3. The fan switch closes at what temperature?






4. How much does a drain line need to drop per foot of length?

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






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






7. What do you use to check for leaks?






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






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






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






11. Most duct insulation is made of what?






12. Where do you apply flux when soldering?






13. The furnace size is calculated by what?






14. How do you calculate ballpark superheat?






15. What is a package unit?






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






17. How many cfm per ton?






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






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






20. When do you install an auxillary drain pan?






21. How many amps can 14 g wire handle?






22. The refrigerant within the evaporator will typically boil at what temperature when it is 75 degrees inside with a relative humidity of 50%?






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






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






25. How are round ducts connected to one another?






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






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






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






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






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






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






32. How do you achieve high-efficiency?






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






34. Superheat should never be below how many degrees






35. Which is more efficient - a TXV or a fixed-orifice metering device?






36. Which is more efficient - a TXV or a fixed-orifice metering device?






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






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






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






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






41. How are round ducts connected to one another?






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






43. How do you calculate LRA?






44. How does ACR copper pipe come?






45. How many amps can 10 g wire handle?






46. 8' round duct has a ballpark cfm of what?






47. The fan switch opens at what temperature?






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






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






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