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. 10 SEER is classified as what kind of efficiency?






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






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






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






5. What is lined duct?






6. What is the design boiling point for most evaporator coils in residential air conditioning?






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






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






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






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






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






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






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






14. Why are some ACR tubing lines insulated?






15. How do you calculate cfm?

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16. On what terminal do you check amperage?






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






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






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






20. Most duct insulation is made of what?






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






22. What is the difference between SEER and EER?






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






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






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






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






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






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






29. What is the design boiling point for most evaporator coils in residential air conditioning?






30. What is the name of the fitting where the branch line leaves the duct?






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






32. How do you calculate cfm?

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






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






35. How will too much refrigerant effect subcooling?






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






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






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






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






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






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






42. Pressure in ductwork is measured In what?






43. At what temperature will brazing melt?






44. Most duct insulation is made of what?






45. 9' round duct has a ballpark cfm of what?






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






47. What is lined duct?






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






49. How are round ducts connected to one another?






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