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. How is ACR tubing sized?






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






3. Superheat should never be below how many degrees






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






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






6. How does ACR copper pipe come?






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






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






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






10. How are round ducts connected to one another?






11. Most duct insulation is made of what?






12. Pressure in ductwork is measured In what?






13. Where do you apply flux when soldering?






14. Where do you apply flux when soldering?






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






16. How many BTU's per ton?






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






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






19. Why are some ACR tubing lines insulated?






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






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






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






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






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






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






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






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






28. 10' round duct has a ballpark cfm of what?






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






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






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






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






33. What is a package unit?






34. Which is more efficient - a TXV or a fixed-orifice metering device?






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






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






37. How much does a drain line need to drop per foot of length?

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38. 6' round duct has a ballpark cfm of what?






39. Pressure in ductwork is measured In what?






40. 7' round duct has a ballpark cfm of what?






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






42. Can refrigerant line sets be altered in length?






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






44. If the rpm's are 1750 - how many poles does the motor have?






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






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






47. The load on the evaporater will effect which pressure?






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






49. How do you calculate the area of a circle?






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