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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. What are the four materials used to make duct?






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






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






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






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






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






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






8. How are round ducts connected to one another?






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






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






11. What is a package unit?






12. 10' round duct has a ballpark cfm of what?






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






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






15. What is the typical temperature difference between a standard-efficiency condenser and the ambient temperature?






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






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






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






19. At what temperature will brazing melt?






20. On what terminal do you check amperage?






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






22. At what temperature will soft solder melt?






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






24. What is lined duct?






25. How many amps can 12 g wire handle?






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






27. The load on the evaporater will effect which pressure?






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






29. How is ACR tubing sized?






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






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






32. Superheat should never be below how many degrees






33. How do you calculate LRA?






34. When do you install an auxillary drain pan?






35. Do you need a trap on a push-through evaporator?






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






37. The fan switch closes at what temperature?






38. 8' round duct has a ballpark cfm of what?






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






40. What is the normal evaporator temperature?






41. What is the typical pressure differance across a TXV?






42. What is the difference between SEER and EER?






43. If the rpm's are 1050 - how many poles does the motor have?






44. How do you calculate EER?






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






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






47. How many amps can 14 g wire handle?






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






49. What standard weight copper tubing is most often used in the heating and air-conditioning industry?






50. Where is insulation used on copper tubing used for air-conditioning?







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