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






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






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






4. What do you use to check for leaks?






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






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






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






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






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






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






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






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






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






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






15. Can refrigerant line sets be altered in length?






16. How do you calculate ballpark superheat?






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






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

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19. What are the three ways a motor can fail electrically?






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






21. On what terminal do you check amperage?






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






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






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






25. How does ACR copper pipe come?






26. Where do you apply flux when soldering?






27. At what temperature will soft solder melt?






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






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






30. How many BTU's per ton?






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






32. What is the typical temperature difference between a standard-efficiency condenser and the ambient temperature?






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






34. What kind of copper tubing is used for plumbing and heating applications?






35. What is the difference between SEER and EER?






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






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






38. 10 SEER is classified as what kind of efficiency?






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






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






41. 7' round duct has a ballpark cfm of what?






42. Can refrigerant line sets be altered in length?






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






44. How do you calculate ballpark superheat?






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






46. On what terminal do you check amperage?






47. What are the two types of blower drives?






48. 10 SEER is classified as what kind of efficiency?






49. How do you calculate EER?






50. The fan switch opens at what temperature?







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