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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. Where do you check the amps on a motor?






3. What can cause a decrease in suction pressure on an air-conditioning system?






4. 10 SEER is classified as what kind of efficiency?






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






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






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

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8. How is ACR tubing sized?






9. How do you calculate LRA?






10. How many amps can 8 g wire handle?






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






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






13. Superheat should never be below how many degrees






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






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






16. The fan switch closes at what temperature?






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






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






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






20. What are the two types of blower drives?






21. How many amps can 14 g wire handle?






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






23. 6' round duct has a ballpark cfm of what?






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






25. At what temperature will soft solder melt?






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






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






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






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






30. What is a package unit?






31. What is considered normal operating conditions?






32. What can cause a decrease in suction pressure on an air-conditioning system?






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






34. How do you calculate EER?






35. How many amps can 10 g wire handle?






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






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






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






39. The fan switch opens at what temperature?






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






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






42. What percentage silver do you need to use for an are-410 system?






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






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






45. On what terminal do you check amperage?






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






47. How is nominal-sized tubing sized?






48. How many amps can 8 g wire handle?






49. What is the normal evaporator temperature?






50. How many cfm per ton?







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