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 do you calculate LRA?






2. How is nominal-sized tubing sized?






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






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






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






6. Square sheet metal duct is normally fabricated in a sheet metal shop and assembled in the field. (True or False)






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






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






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






10. Superheat should never be below how many degrees






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






12. How do you calculate ballpark superheat?






13. What is the normal evaporator temperature?






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






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






16. 7' round duct has a ballpark cfm of what?






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






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






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






20. What are the two types of blower drives?






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






22. How is ACR tubing sized?






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






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






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






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






27. The fan switch closes at what temperature?






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






29. What are the two types of blower drives?






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






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






32. How is insulation around a duct rated?






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






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






35. What component changes refrigerant from a low pressure gas to a high pressure gas?






36. What do you use to check for leaks?






37. 10 SEER is classified as what kind of efficiency?






38. How does ACR copper pipe come?






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






40. How is insulation around a duct rated?






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






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






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






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






45. Where do you apply flux when soldering?






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






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






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






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






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