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. How many amps can 10 g wire handle?






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






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






4. Can refrigerant line sets be altered in length?






5. What is the difference between SEER and EER?






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






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






8. How many amps can 12 g wire handle?






9. Do you need a trap on a push-through evaporator?






10. What kind of metering device do high-efficiency units usually use?






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






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






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






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






15. 7' round duct has a ballpark cfm of what?






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






17. How many cfm per ton?






18. What is a package unit?






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






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






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






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






23. How many amps can 8 g wire handle?






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






25. Do you need a trap on a push-through evaporator?






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






27. At what temperature will brazing melt?






28. How are round ducts supported?

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29. What are normal conditions - as defined by the ARI.






30. The furnace size is calculated by what?






31. What are the two types of blower drives?






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






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






34. 10 SEER is classified as what kind of efficiency?






35. What do you use to check for leaks?






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






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






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






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






40. How do you calculate ballpark superheat?






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






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






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






44. How do you calculate LRA?






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






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






47. What is lined duct?






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






49. Most duct insulation is made of what?






50. Superheat should never be below how many degrees