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 do you do after you braze a system?






2. At what temperature will brazing melt?






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






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






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






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






7. How is the high pressure switch wired with the low pressure switch?






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






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






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






11. How does ACR copper pipe come?






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






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






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






15. The fan switch opens at what temperature?






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






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






18. How many amps can 10 g wire handle?






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






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






21. 6' round duct has a ballpark cfm of what?






22. What are the three crafts normally associated with an air-conditioned installation?






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






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






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






26. How is flexible duct supported?






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






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






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






30. What is the difference between SEER and EER?






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






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






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






34. How will too much refrigerant effect superheat?






35. Why are some ACR tubing lines insulated?






36. How do you calculate cfm?

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






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






39. How are round ducts supported?

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






41. If pressure rises - what happens to the superheat?






42. What gauge is thermostat wire?






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






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






45. Where do you install a trap on a drain line?






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






47. What are the three pressures created by moving air in ductwork?






48. If pressure rises - what happens to the superheat?






49. What is the name of the fitting where the branch line leaves the duct?






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