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. When do you install an auxillary drain pan?






2. At what temperature will soft solder melt?






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






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






5. Most duct insulation is made of what?






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






7. Do you need a trap on a pull-through evaporator?






8. How many BTU's per ton?






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






10. When do you install an auxillary drain pan?






11. What do you use to check for leaks?






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






13. Superheat should never be below how many degrees






14. How many amps can 14 g wire handle?






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






16. At what temperature will soft solder melt?






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






18. 10' round duct has a ballpark cfm of what?






19. What do you use to check for leaks?






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






21. How is ACR tubing sized?






22. The furnace size is calculated by what?






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






24. How many amps can 10 g wire handle?






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






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






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






28. What gauge is thermostat wire?






29. On what terminal do you check amperage?






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






31. The fan switch opens at what temperature?






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






33. How many cfm per ton?






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






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






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






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






38. What are the two types of return air systems in residential installations?






39. The fan switch closes at what temperature?






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






41. 7' round duct has a ballpark cfm of what?






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






43. 8' round duct has a ballpark cfm of what?






44. What are the two types of blower drives?






45. How many amps can 10 g wire handle?






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






47. 10 SEER is classified as what kind of efficiency?






48. How will too much refrigerant effect superheat?






49. What are the three pressures created by moving air in ductwork?






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