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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. Do you need a vent on a pull-through evaporator?






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






3. When do you install an auxillary drain pan?






4. Do you need a trap on a pull-through evaporator?






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






6. The A/C size is calculated by what?






7. The fan switch opens at what temperature?






8. How is insulation around a duct rated?






9. How many amps can 12 g wire handle?






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






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






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






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






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






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






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






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






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






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






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






21. Pressure in ductwork is measured In what?






22. 6' round duct has a ballpark cfm of what?






23. What are the two types of blower drives?






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






25. What is lined duct?






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






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






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






29. At what temperature will brazing melt?






30. How many amps can 8 g wire handle?






31. Where do you apply flux when soldering?






32. What are the two functions of the air-conditioning system?






33. What is the difference between SEER and EER?






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






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






36. The fan switch closes at what temperature?






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






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






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






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






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






42. How many amps can 10 g wire handle?






43. How are round ducts supported?

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44. 13 SEER is classified as what kind of efficiency?






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






46. What are the two types of blower drives?






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






48. Superheat should never be below how many degrees






49. How are the high pressure switch and the low pressure switch wired with the compressor contactor?






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






Can you answer 50 questions in 15 minutes?



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