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






2. How do you calculate LRA?






3. How many amps can 12 g wire handle?






4. What is considered normal operating conditions?






5. 7' round duct has a ballpark cfm of what?






6. How many amps can 8 g wire handle?






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






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






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






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






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






12. At what temperature will soft solder melt?






13. How do you calculate ballpark superheat?






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






15. A reciprocating compressor has what sort of moving parts?






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






17. How many amps can 14 g wire handle?






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






19. On what terminal do you check amperage?






20. What do you use to check for leaks?






21. Where do you apply flux when soldering?






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






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






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






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






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






27. How is ACR tubing sized?






28. What gauge is thermostat wire?






29. How does ACR copper pipe come?






30. What is considered normal operating conditions?






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






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






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






34. If the rpm's are 3450 - how many poles does the motor have?






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






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






37. The fan switch closes at what temperature?






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






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






40. Can refrigerant line sets be altered in length?






41. How many amps can 10 g wire handle?






42. How will too much refrigerant effect superheat?






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






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






45. How do you calculate cfm?

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46. What percentage silver do you need to use for an are-410 system?






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






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






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






50. What is a package unit?






Can you answer 50 questions in 15 minutes?



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