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






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






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






4. Will a dirty condenser cause a rise or fall in pressure?






5. At what temperature will brazing melt?






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






7. What are the two types of package units?






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






9. How many cfm per ton?






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






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






12. How is nominal-sized tubing sized?






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






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






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






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






17. What are the two types of blower drives?






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






19. Can refrigerant line sets be altered in length?






20. Superheat should never be below how many degrees






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






22. Why are some ACR tubing lines insulated?






23. What is considered normal operating conditions?






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






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






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






27. When do you install an auxillary drain pan?






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






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






30. Why are some ACR tubing lines insulated?






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






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






33. How do you achieve high-efficiency?






34. 8' round duct has a ballpark cfm of what?






35. The fan switch opens at what temperature?






36. How long should you leave a system off once you kill power before restarting it?






37. How are round ducts supported?

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






39. Will a dirty condenser cause a rise or fall in pressure?






40. What is a package unit?






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






42. Pressure in ductwork is measured In what?






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






44. Pressure in ductwork is measured In what?






45. What is the difference between SEER and EER?






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






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






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






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






50. On what terminal do you check amperage?