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. The furnace size is calculated by what?






2. How are round ducts supported?

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3. How is the high pressure switch wired with the low pressure switch?






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






5. At what temperature will brazing melt?






6. How do you calculate ballpark superheat?






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






8. How will an overcharge affect an air-conditioning system with a fixed-orifice type metering device?






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






10. How are high-efficiency condenser coils different from standard-efficiency condenser coils?






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






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






13. How do you calculate LRA?






14. How is insulation around a duct rated?






15. How are high-efficiency condenser coils different from standard-efficiency condenser coils?






16. How do you calculate EER?






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






18. Do you need a vent on a pull-through evaporator?






19. 10 SEER is classified as what kind of efficiency?






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






21. 10' round duct has a ballpark cfm of what?






22. How much does a drain line need to drop per foot of length?

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






24. On what terminal do you check amperage?






25. What do you use to check for leaks?






26. Where do you apply flux when soldering?






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






28. What kind of copper tubing is used for plumbing and heating applications?






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






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






31. Do you need a vent on a pull-through evaporator?






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






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






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






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






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






37. The fan switch closes at what temperature?






38. How many cfm per ton?






39. What is considered normal operating conditions?






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






41. What do you do after you braze a system?






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






43. How does ACR copper pipe come?






44. Superheat should never be below how many degrees






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






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






47. How many BTU's per ton?






48. What is the typical pressure differance across a TXV?






49. If the rpm's are 1050 - how many poles does the motor have?






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