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. A reciprocating compressor has what sort of moving parts?






2. 13 SEER is classified as what kind of efficiency?






3. Where do you apply flux when soldering?






4. How do you calculate LRA?






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






6. How is nominal-sized tubing sized?






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






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






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






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






11. Do you need a trap on a push-through evaporator?






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






13. What is the difference between SEER and EER?






14. How many cfm per ton?






15. What is the normal evaporator temperature?






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






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






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






19. How do you calculate LRA?






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






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






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






23. How many amps can 8 g wire handle?






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






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






26. Can refrigerant line sets be altered in length?






27. How will too much refrigerant effect subcooling?






28. What is the name of the fitting where the branch line leaves the duct?






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






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






31. Superheat should never be below how many degrees






32. Most duct insulation is made of what?






33. 10 SEER is classified as what kind of efficiency?






34. Where is insulation used on copper tubing used for air-conditioning?






35. How do you achieve high-efficiency?






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






37. Pressure in ductwork is measured In what?






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






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






40. What is used to measure static air pressure in ducts.






41. The fan switch opens at what temperature?






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






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






44. What are the two types of return air systems in residential installations?






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






46. How do you achieve high-efficiency?






47. What are the two types of package units?






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






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






50. What are the two types of blower drives?