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






2. What sort of pressure will a push-through evaporator have?






3. What is a package unit?






4. On what terminal do you check amperage?






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






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






7. What is considered normal operating conditions?






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






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






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






11. Why are some ACR tubing lines insulated?






12. How many cfm per ton?






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






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






15. What is a package unit?






16. Can refrigerant line sets be altered in length?






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






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






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






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






21. What are the two types of package units?






22. 8' round duct has a ballpark cfm of what?






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






24. Most duct insulation is made of what?






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






26. How is ACR tubing sized?






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






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






29. How will too much refrigerant effect subcooling?






30. How many amps can 8 g wire handle?






31. At what temperature will soft solder melt?






32. How do you calculate EER?






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






34. How many cfm per ton?






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






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






37. How does ACR copper pipe come?






38. How many amps can 14 g wire handle?






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






40. What is it called when liquid refrigerant gets into the compressor?






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






42. 10' round duct has a ballpark cfm of what?






43. Where do you apply flux when soldering?






44. What are the two types of blower drives?






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






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






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






48. How are high-efficiency condenser coils different from standard-efficiency condenser coils?






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






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