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






2. The furnace size is calculated by what?






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






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






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






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






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






8. How do you calculate EER?






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






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






11. Sections of duct board can be fastened together with what?






12. What do you do after you braze a system?






13. On what terminal do you check amperage?






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






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






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






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






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






19. How many BTU's per ton?






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






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






22. What are the two types of blower drives?






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






24. Where do you check the amps on a motor?






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






26. How do you calculate cfm?

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






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






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






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






31. Superheat should never be below how many degrees






32. How do you calculate cfm?

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






34. How does ACR copper pipe come?






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






36. How many amps can 10 g wire handle?






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






38. How are round ducts supported?

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39. The fan switch opens at what temperature?






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






41. The fan switch closes at what temperature?






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






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






44. What gauge is thermostat wire?






45. 6' round duct has a ballpark cfm of what?






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






47. In what state is the refrigerant in the compressor?






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






49. Most duct insulation is made of what?






50. How do you calculate LRA?







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


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