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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. Which type of wire can handle a higher ampacity?






2. What kind of refrigeratnts must be added in liquid form?






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






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






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






6. At what temperature will soft solder melt?






7. How do you calculate ballpark superheat?






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






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






10. How do you calculate cfm?

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






12. How do you calculate LRA?






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






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






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






16. How does ACR copper pipe come?






17. How are round ducts connected to one another?






18. How will too much refrigerant effect subcooling?






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






20. How many cfm per ton?






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






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






23. How is insulation around a duct rated?






24. Where do you install a trap on a drain line?






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






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






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






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






29. How are round ducts supported?

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30. What gauge is thermostat wire?






31. How will too much refrigerant effect superheat?






32. 8' round duct has a ballpark cfm of what?






33. At what temperature will brazing melt?






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






35. How many amps can 12 g wire handle?






36. 10' round duct has a ballpark cfm of what?






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






38. What do you use to check for leaks?






39. The furnace size is calculated by what?






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






41. How many amps can 10 g wire handle?






42. How are the condenser coils different on a high-efficiency unit?






43. How do you achieve high-efficiency?






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






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






46. How do you achieve high-efficiency?






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






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






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






50. What is considered normal operating conditions?







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