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. How many BTU's per ton?






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






3. How do you calculate ballpark superheat?






4. What are the two types of blower drives?






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






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






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






8. Which type of wire can handle a higher ampacity?






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






10. Why is it necessary to have multiple refrigerant circuits in some evaporator coils?






11. Can refrigerant line sets be altered in length?






12. How do you achieve high-efficiency?






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






14. On what terminal do you check amperage?






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






16. What are the three major power-consuming devices on an air-conditioning system?






17. At what temperature will soft solder melt?






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






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






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






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






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






23. Why are some ACR tubing lines insulated?






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






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






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






27. How many amps can 10 g wire handle?






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






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






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






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






32. How is insulation around a duct rated?






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






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






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






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






37. What is the difference between SEER and EER?






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






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






40. How are round ducts connected to one another?






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






42. Does a package unit come from the factory pre-charged?






43. 13 SEER is classified as what kind of efficiency?






44. What are the three major power-consuming devices on an air-conditioning system?






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






46. 7' round duct has a ballpark cfm of what?






47. How many amps can 14 g wire handle?






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






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






50. 8' round duct has a ballpark cfm of what?