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






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






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






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






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






6. Can refrigerant line sets be altered in length?






7. 13 SEER is classified as what kind of efficiency?






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






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






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






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






12. 8' round duct has a ballpark cfm of what?






13. The furnace size is calculated by what?






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






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






16. At what temperature will soft solder melt?






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






18. At what temperature will soft solder melt?






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






20. How many amps can 12 g wire handle?






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






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






23. How many cfm per ton?






24. Why are some ACR tubing lines insulated?






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






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






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






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






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






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






31. How many cfm per ton?






32. What is a package unit?






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






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






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






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






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






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






39. Where do you apply flux when soldering?






40. How many amps can 8 g wire handle?






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






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






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






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






45. The fan switch closes at what temperature?






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






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






48. How do you calculate cfm?

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






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

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