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. What is the range for normal superheat and subcooling?






2. What is the difference between SEER and EER?






3. When do you install an auxillary drain pan?






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






5. How will too much refrigerant effect superheat?






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






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






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






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






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






11. 7' round duct has a ballpark cfm of what?






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






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






14. How many amps can 12 g wire handle?






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






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






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






18. How do you calculate EER?






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






20. What kind of metering device do high-efficiency units usually use?






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






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






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






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






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






26. What is considered normal operating conditions?






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. Where do you check the amps on a motor?






29. What component changes refrigerant from a low pressure gas to a high pressure gas?






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

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31. How is ACR tubing sized?






32. What do you use to check for leaks?






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






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






35. How do you calculate cfm?

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






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






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






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






40. How do you calculate EER?






41. What are the three ways a motor can fail electrically?






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






43. What are the two types of package units?






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






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






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






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






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






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






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