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. The fan switch opens at what temperature?






2. How is flexible duct supported?






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






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






5. How do you achieve high-efficiency?






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






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






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






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






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






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






12. How will too much refrigerant effect superheat?






13. If the suction pressure rises - what happens to the head pressure?






14. What is it called when liquid refrigerant gets into the compressor?






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






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






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






18. At what temperature will brazing melt?






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






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






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






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






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






24. What is considered normal operating conditions?






25. What is the difference between SEER and EER?






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






27. What kind of copper tubing is used for plumbing and heating applications?






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






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






30. How are round ducts supported?


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






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






33. Why are some ACR tubing lines insulated?






34. What do you use to check for leaks?






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






36. When do you install an auxillary drain pan?






37. Where do you apply flux when soldering?






38. Pressure in ductwork is measured In what?






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






40. When do you install an auxillary drain pan?






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






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






43. Where do you apply flux when soldering?






44. What is considered normal operating conditions?






45. 10 SEER is classified as what kind of efficiency?






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






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






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






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






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