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






2. How do you calculate LRA?






3. If the rpm's are 750 - how many poles does the motor have?






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






5. The furnace size is calculated by what?






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






7. When do you install an auxillary drain pan?






8. How do you calculate ballpark superheat?






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






10. How do you calculate cfm?

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






12. How is ACR tubing sized?






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






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






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






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






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






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






19. How is insulation around a duct rated?






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






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






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






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






24. 10 SEER is classified as what kind of efficiency?






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






26. What is the difference between SEER and EER?






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






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






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






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






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






32. What is the normal evaporator temperature?






33. How do you calculate cfm?

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






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






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






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






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






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






40. 8' round duct has a ballpark cfm of what?






41. What tool is used to expand the diameter of soft copper tubing






42. Multiple-zone systems often use what to alleviate the problem of excess air when only some zones are calling for conditioning?






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






44. At what temperature does refrigerant condense in a high-efficiency unit?






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






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






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






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






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






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