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 kind of metering device do high-efficiency units usually use?






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






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






4. How do you achieve high-efficiency?






5. How many amps can 8 g wire handle?






6. How will too much refrigerant effect superheat?






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






8. If pressure rises - what happens to the superheat?






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






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






11. How are round ducts connected to one another?






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






13. What is lined duct?






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






15. If the rpm's are 3450 - how many poles does the motor have?






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






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






18. How many amps can 14 g wire handle?






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






20. How many BTU's per ton?






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






22. 8' round duct has a ballpark cfm of what?






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






24. Can refrigerant line sets be altered in length?






25. Pressure in ductwork is measured In what?






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






27. How do you calculate ballpark superheat?






28. Superheat should never be below how many degrees






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






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






31. How many amps can 10 g wire handle?






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






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






34. What do you use to check for leaks?






35. 13 SEER is classified as what kind of efficiency?






36. If the rpm's are 3450 - how many poles does the motor have?






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






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






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






40. Most duct insulation is made of what?






41. How many amps can 12 g wire handle?






42. Where do you apply flux when soldering?






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






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






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






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






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






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






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






50. What is a package unit?