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






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






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






4. The fan switch opens at what temperature?






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






6. At what temperature will brazing melt?






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






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






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






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






11. How do you calculate EER?






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






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






14. What percentage silver do you use to braze two dissimilar metals such as steel and copper?






15. What percentage silver do you use to braze two dissimilar metals such as steel and copper?






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






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






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






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






20. 13 SEER is classified as what kind of efficiency?






21. When do you install an auxillary drain pan?






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






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






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






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

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26. The fan switch closes at what temperature?






27. 13 SEER is classified as what kind of efficiency?






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






29. How is flexible duct supported?






30. How long should you leave a system off once you kill power before restarting it?






31. What is the typical pressure differance across a TXV?






32. What gauge is thermostat wire?






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






34. How long should you leave a system off once you kill power before restarting it?






35. The furnace size is calculated by what?






36. 10 SEER is classified as what kind of efficiency?






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






38. What is the difference between SEER and EER?






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






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






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






42. How many amps can 8 g wire handle?






43. How many amps can 12 g wire handle?






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






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






46. How is flexible duct supported?






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






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






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






50. How do you calculate ballpark superheat?