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 normal evaporator temperature?






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






3. How many cfm per ton?






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






5. What is a package unit?






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






7. 13 SEER is classified as what kind of efficiency?






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






9. How is nominal-sized tubing sized?






10. 6' round duct has a ballpark cfm of what?






11. Pressure in ductwork is measured In what?






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






13. How do you calculate EER?






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






15. What standard weight copper tubing is most often used in the heating and air-conditioning industry?






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






17. What do you use to check for leaks?






18. What are the two types of blower drives?






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






20. How does ACR copper pipe come?






21. How many amps can 10 g wire handle?






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






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






24. The fan switch closes at what temperature?






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






26. When do you install an auxillary drain pan?






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






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






29. What standard weight copper tubing is most often used in the heating and air-conditioning industry?






30. How do you calculate LRA?






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






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






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






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






35. 10' round duct has a ballpark cfm of what?






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






37. The fan switch opens at what temperature?






38. What are the two types of blower drives?






39. How many amps can 8 g wire handle?






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






41. Do you need a vent on a pull-through evaporator?






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






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






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






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






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






47. At what temperature will brazing melt?






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






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






50. What is considered normal operating conditions?