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






2. How many amps can 12 g wire handle?






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






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






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






6. What are the two types of blower drives?






7. What are normal conditions - as defined by the ARI.






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






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






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






11. Why are some ACR tubing lines insulated?






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






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






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






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






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






17. Where do you apply flux when soldering?






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






19. 7' round duct has a ballpark cfm of what?






20. What is the difference between SEER and EER?






21. In what state is the refrigerant in the compressor?






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






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






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






25. The fan switch opens at what temperature?






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






27. How many cfm per ton?






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






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






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






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






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






33. What is lined duct?






34. What is a package unit?






35. How will too much refrigerant effect subcooling?






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






37. The evaporator is designed to remove what two types of heat?






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






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






40. Can refrigerant line sets be altered in length?






41. The fan switch closes at what temperature?






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






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






44. Do you need a vent on a push-through evaporator?






45. How do you calculate cfm?

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






47. 6' round duct has a ballpark cfm of what?






48. At what temperature will brazing melt?






49. How do you achieve high-efficiency?






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







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