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






2. What is the normal evaporator temperature?






3. Most duct insulation is made of what?






4. 10' round duct has a ballpark cfm of what?






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






6. The fan switch closes at what temperature?






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






8. How are the condenser coils different on a high-efficiency unit?






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






10. Most duct insulation is made of what?






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






12. 8' round duct has a ballpark cfm of what?






13. 10 SEER is classified as what kind of efficiency?






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






15. What are the two types of blower drives?






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






17. 10 SEER is classified as what kind of efficiency?






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






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






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






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






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






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






24. When do you install an auxillary drain pan?






25. What is lined duct?






26. How do you calculate LRA?






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






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






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






30. How does ACR copper pipe come?






31. Multiple-zone systems often use what to alleviate the problem of excess air when only some zones are calling for conditioning?






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






33. What gauge is thermostat wire?






34. 13 SEER is classified as what kind of efficiency?






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






36. How do you achieve high-efficiency?






37. What are the two functions of the air-conditioning system?






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






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






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






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






42. How many amps can 10 g wire handle?






43. How do you calculate EER?






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






45. At what temperature does refrigerant condense in a standard-efficiency unit?






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






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






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






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






50. Does a package unit come from the factory pre-charged?