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






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






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






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






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






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






7. How is ACR tubing sized?






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






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






10. Why are some ACR tubing lines insulated?






11. What is the difference between SEER and EER?






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






13. What gauge is thermostat wire?






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






15. What tool is used to expand the diameter of soft copper tubing






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






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






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






19. If the rpm's are 750 - how many poles does the motor have?






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






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






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






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






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






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






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






27. Can refrigerant line sets be altered in length?






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






29. At what temperature will brazing melt?






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






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






32. How do you calculate ballpark superheat?






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






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






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






36. When do you install an auxillary drain pan?






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






38. What is the normal evaporator temperature?






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






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






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






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






43. How are round ducts supported?

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






45. 9' round duct has a ballpark cfm of what?






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






47. Pressure in ductwork is measured In what?






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






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






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