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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 are the two ways that fresh air enters a structure?






2. Can refrigerant line sets be altered in length?






3. How does ACR copper pipe come?






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






5. Where is insulation used on copper tubing used for air-conditioning?






6. What gauge is thermostat wire?






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






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






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






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






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






12. The fan switch closes at what temperature?






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






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






15. How many BTU's per ton?






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






17. How many amps can 12 g wire handle?






18. Pressure in ductwork is measured In what?






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






20. How is ACR tubing sized?






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






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






23. What is the normal evaporator temperature?






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






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






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






27. At what temperature will soft solder melt?






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






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






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






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






32. Superheat should never be below how many degrees






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






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






35. How many amps can 8 g wire handle?






36. The load on the evaporater will effect which pressure?






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






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






39. Can refrigerant line sets be altered in length?






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






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






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






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






44. On what terminal do you check amperage?






45. How many amps can 14 g wire handle?






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






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






48. How will too much refrigerant effect subcooling?






49. What is the difference between SEER and EER?






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






Can you answer 50 questions in 15 minutes?



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