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






2. Where do you apply flux when soldering?






3. 8' round duct has a ballpark cfm of what?






4. On what terminal do you check amperage?






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






6. What are the components of a hard-start kit?






7. How are round ducts connected to one another?






8. How is ACR tubing sized?






9. Most duct insulation is made of what?






10. What distributes supply air to a room in a structure?






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






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






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






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






15. 6' round duct has a ballpark cfm of what?






16. How do you achieve high-efficiency?






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






18. At what temperature will soft solder melt?






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






20. How is flexible duct supported?






21. How do you calculate EER?






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






23. How is insulation around a duct rated?






24. 7' round duct has a ballpark cfm of what?






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






26. Can refrigerant line sets be altered in length?






27. How many amps can 12 g wire handle?






28. What are the two types of package units?






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






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






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






32. How are round ducts connected to one another?






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






34. 9' round duct has a ballpark cfm of what?






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






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






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






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






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






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






41. What is lined duct?






42. When do you install an auxillary drain pan?






43. What do you use to check for leaks?






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






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






46. The crankcase heater on an air-conditioning compressor is used to what?






47. 10 SEER is classified as what kind of efficiency?






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






49. How many cfm per ton?






50. How is flexible duct supported?