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






2. How many cfm per ton?






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






4. What are the two types of package units?






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






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






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






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






9. When do you install an auxillary drain pan?






10. How do you achieve high-efficiency?






11. What are the two types of blower drives?






12. 13 SEER is classified as what kind of efficiency?






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






14. How is insulation around a duct rated?






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






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






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






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






19. The A/C size is calculated by what?






20. How is ACR tubing sized?






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






22. How many amps can 14 g wire handle?






23. How do you calculate cfm?

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






25. What is considered normal operating conditions?






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






27. What component changes refrigerant from a low pressure gas to a high pressure gas?






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






29. On what terminal do you check amperage?






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






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






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






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






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






35. The fan switch closes at what temperature?






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






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






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






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






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






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






42. What is the normal evaporator temperature?






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






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






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






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






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






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






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






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







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