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






2. What is considered normal operating conditions?






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






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






5. Superheat should never be below how many degrees






6. What is a package unit?






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






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






9. How many amps can 12 g wire handle?






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






11. How is flexible duct supported?






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






13. How are round ducts connected to one another?






14. 10 SEER is classified as what kind of efficiency?






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






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






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






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






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






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






21. The fan switch closes at what temperature?






22. How do you calculate LRA?






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






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






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






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






27. How many amps can 8 g wire handle?






28. How many amps can 8 g wire handle?






29. 13 SEER is classified as what kind of efficiency?






30. 7' round duct has a ballpark cfm of what?






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






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






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






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






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






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






37. 8' round duct has a ballpark cfm of what?






38. Where do you apply flux when soldering?






39. The fan switch opens at what temperature?






40. What is the typical temperature difference between a high-efficiency condenser and the ambient temperature?






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






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






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






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






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






46. How do you calculate EER?






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






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






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






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