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. What is a package unit?






2. What gauge is thermostat wire?






3. 7' round duct has a ballpark cfm of what?






4. 13 SEER is classified as what kind of efficiency?






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






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






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






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






9. How do you calculate LRA?






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






11. Most duct insulation is made of what?






12. Why are some ACR tubing lines insulated?






13. What is considered normal operating conditions?






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






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






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






17. How is insulation around a duct rated?






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






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






20. How do you calculate ballpark superheat?






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






22. How many amps can 8 g wire handle?






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






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






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






26. How does ACR copper pipe come?






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






28. How are round ducts supported?

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29. How many amps can 14 g wire handle?






30. At what temperature will brazing melt?






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






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






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






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






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






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






37. How do you calculate EER?






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






39. How do you calculate ballpark superheat?






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






41. How do you calculate EER?






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






43. How many amps can 14 g wire handle?






44. 9' round duct has a ballpark cfm of what?






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






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






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






48. What are the two types of package units?






49. What are the three crafts normally associated with an air-conditioned installation?






50. 6' round duct has a ballpark cfm of what?