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 are the two ways that fresh air enters a structure?






2. How is ACR tubing sized?






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






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






5. What is considered normal operating conditions?






6. 10 SEER is classified as what kind of efficiency?






7. 10' round duct has a ballpark cfm of what?






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






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






10. 7' round duct has a ballpark cfm of what?






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






27. What are the three ways a motor can fail electrically?






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






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






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






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






32. The A/C size is calculated by what?






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






34. What is the name of the fitting where the branch line leaves the duct?






35. 13 SEER is classified as what kind of efficiency?






36. How will too much refrigerant effect subcooling?






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






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






39. What is the difference between SEER and EER?






40. Can refrigerant line sets be altered in length?






41. How is insulation around a duct rated?






42. 9' round duct has a ballpark cfm of what?






43. 13 SEER is classified as what kind of efficiency?






44. What is the normal evaporator temperature?






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






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






47. How many amps can 8 g wire handle?






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






49. How many amps can 14 g wire handle?






50. The fan switch closes at what temperature?