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. How will too much refrigerant effect subcooling?






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






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






4. The furnace size is calculated by what?






5. 13 SEER is classified as what kind of efficiency?






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






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






8. What is the difference between SEER and EER?






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






10. Which is more efficient - a TXV or a fixed-orifice metering device?






11. Superheat should never be below how many degrees






12. Pressure in ductwork is measured In what?






13. How is insulation around a duct rated?






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






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

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16. When do you install a trap on a drain line?






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






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






19. 10 SEER is classified as what kind of efficiency?






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






21. How will too much refrigerant effect superheat?






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






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






24. Why are some ACR tubing lines insulated?






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






26. How will too much refrigerant effect subcooling?






27. How many amps can 8 g wire handle?






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






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






30. At what temperature will soft solder melt?






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






32. The fan switch closes at what temperature?






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






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






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






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






37. Where do you apply flux when soldering?






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






39. How many amps can 14 g wire handle?






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






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






42. How many cfm per ton?






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






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






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






46. How many amps can 10 g wire handle?






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






48. Most duct insulation is made of what?






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






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