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. How is nominal-sized tubing sized?






2. How are round ducts supported?

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3. What can cause a decrease in suction pressure on an air-conditioning system?






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






5. 10' round duct has a ballpark cfm of what?






6. At what temperature will soft solder melt?






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






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






9. On what terminal do you check amperage?






10. What can cause a decrease in suction pressure on an air-conditioning system?






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






12. How many amps can 12 g wire handle?






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






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






15. What are the two types of blower drives?






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






17. How many BTU's per ton?






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






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






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






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






22. When do you install an auxillary drain pan?






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






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






25. How many amps can 12 g wire handle?






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






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






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






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






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






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






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






33. 13 SEER is classified as what kind of efficiency?






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






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






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






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






38. What is lined duct?






39. How does ACR copper pipe come?






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






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

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42. How is insulation around a duct rated?






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






44. 10 SEER is classified as what kind of efficiency?






45. Why are some ACR tubing lines insulated?






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






47. Why are some ACR tubing lines insulated?






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






49. How many amps can 14 g wire handle?






50. 10' round duct has a ballpark cfm of what?