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. Why are some ACR tubing lines insulated?






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






3. What are the four materials used to make duct?






4. What gauge is thermostat wire?






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






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






7. What type of air conditioning system must be charged using the superheat method?






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






9. How many amps can 12 g wire handle?






10. How many amps can 14 g wire handle?






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






12. How is flexible duct supported?






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






14. What is a package unit?






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






16. What do you use to check for leaks?






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






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






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






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






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






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






23. How is insulation around a duct rated?






24. 10' round duct has a ballpark cfm of what?






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






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






27. How many cfm per ton?






28. How do you calculate EER?






29. 6' round duct has a ballpark cfm of what?






30. How is nominal-sized tubing sized?






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






32. On what terminal do you check amperage?






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






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






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






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






37. The fan switch closes at what temperature?






38. 10 SEER is classified as what kind of efficiency?






39. Pressure in ductwork is measured In what?






40. Superheat should never be below how many degrees






41. At what temperature does refrigerant condense in a high-efficiency unit?






42. What are the three crafts normally associated with an air-conditioned installation?






43. How many amps can 8 g wire handle?






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






45. Where do you apply flux when soldering?






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






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






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






49. What are the two types of blower drives?






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