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 will too much refrigerant effect superheat?






2. Most duct insulation is made of what?






3. What are the three ways a motor can fail electrically?






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






5. How do you calculate cfm?

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6. How do you calculate cfm?

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7. At what temperature will soft solder melt?






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






9. What do you use to check for leaks?






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






11. How many BTU's per ton?






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






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






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






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






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






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






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






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






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






21. How many amps can 10 g wire handle?






22. What is the difference between SEER and EER?






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






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






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






26. How will too much refrigerant effect superheat?






27. What is the normal evaporator temperature?






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






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






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






31. What is considered normal operating conditions?






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






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






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






35. How are high-efficiency condenser coils different from standard-efficiency condenser coils?






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






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






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






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






40. 9' round duct has a ballpark cfm of what?






41. How many cfm per ton?






42. Pressure in ductwork is measured In what?






43. On what terminal do you check amperage?






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






45. How is nominal-sized tubing sized?






46. How much does a drain line need to drop per foot of length?

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






48. How is flexible duct supported?






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






50. The fan switch opens at what temperature?







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