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 components of a hard-start kit?






2. What do you use to check for leaks?






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






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






5. How many BTU's per ton?






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






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






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






9. How much superheat do you need to prevent liquid refrigerant from entering the compressor?






10. Where do you check the amps on a motor?






11. What is considered normal operating conditions?






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






13. When do you install an auxillary drain pan?






14. When do you install an auxillary drain pan?






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






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






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






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






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






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






21. Can refrigerant line sets be altered in length?






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






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






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






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






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






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






28. How are round ducts connected to one another?






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






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






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






32. How many cfm per ton?






33. 9' round duct has a ballpark cfm of what?






34. What do you use to check for leaks?






35. Most duct insulation is made of what?






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






37. Will a dirty condenser cause a rise or fall in pressure?






38. How many amps can 12 g wire handle?






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






40. What is the normal evaporator temperature?






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






42. How is insulation around a duct rated?






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






44. Can refrigerant line sets be altered in length?






45. How do you calculate cfm?

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






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






48. How will too much refrigerant effect superheat?






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






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