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






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






3. How do you calculate cfm?

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






5. What gauge is thermostat wire?






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






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






8. How many cfm per ton?






9. When do you install a trap on a drain line?






10. The compressor is cooled by liquid refrigerant. (True of False)






11. How many amps can 12 g wire handle?






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






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






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






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






16. What is considered normal operating conditions?






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






18. Why are some ACR tubing lines insulated?






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






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






21. Square sheet metal duct is normally fabricated in a sheet metal shop and assembled in the field. (True or False)






22. Which is more efficient - a TXV or a fixed-orifice metering device?






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






24. 6' round duct has a ballpark cfm of what?






25. The compressor is cooled by liquid refrigerant. (True of False)






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






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






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






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






30. At what temperature will soft solder melt?






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

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






33. What gauge is thermostat wire?






34. How many amps can 14 g wire handle?






35. How many amps can 14 g wire handle?






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






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






38. On what terminal do you check amperage?






39. What is lined duct?






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






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






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






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






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






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






46. Superheat should never be below how many degrees






47. How do you achieve high-efficiency?






48. How many BTU's per ton?






49. How many amps can 12 g wire handle?






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