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






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






3. What type of air conditioning system must be charged using the superheat method?






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






5. What do you use to check for leaks?






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






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






8. Most duct insulation is made of what?






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






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






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






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






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






14. At what temperature will soft solder melt?






15. What is lined duct?






16. Where do you apply flux when soldering?






17. Pressure in ductwork is measured In what?






18. What is considered normal operating conditions?






19. How do you calculate LRA?






20. How will too much refrigerant effect superheat?






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






22. What is the normal evaporator temperature?






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






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






25. Pressure in ductwork is measured In what?






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






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






28. 6' round duct has a ballpark cfm of what?






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






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






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






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






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






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






35. How do you achieve high-efficiency?






36. The furnace size is calculated by what?






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






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






39. 8' round duct has a ballpark cfm of what?






40. What type of air conditioning system must be charged using the superheat method?






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

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42. How many BTU's per ton?






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






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






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






46. 10' round duct has a ballpark cfm of what?






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






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






49. Square sheet metal duct is normally fabricated in a sheet metal shop and assembled in the field. (True or False)






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