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 load on the evaporater will effect which pressure?






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






3. The fan switch opens at what temperature?






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






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






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






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






8. What is the normal evaporator temperature?






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






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






11. 8' round duct has a ballpark cfm of what?






12. How does ACR copper pipe come?






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






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






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






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






17. What do you use to check for leaks?






18. When do you install an auxillary drain pan?






19. What is a package unit?






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






21. What is lined duct?






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






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






24. How do you calculate EER?






25. What are the two types of blower drives?






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

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






28. What are the two types of package units?






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






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






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






32. The fan switch opens at what temperature?






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






34. How will too much refrigerant effect subcooling?






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






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






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






38. What is a package unit?






39. What sort of pressure will a pull-through evaporator have?






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






41. How is nominal-sized tubing sized?






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






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






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






45. 10 SEER is classified as what kind of efficiency?






46. Superheat should never be below how many degrees






47. How many amps can 10 g wire handle?






48. How many amps can 14 g wire handle?






49. How is nominal-sized tubing sized?






50. What sort of pressure will a pull-through evaporator have?