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






2. How will too much refrigerant effect superheat?






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






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






5. How does ACR copper pipe come?






6. Pressure in ductwork is measured In what?






7. What is considered normal operating conditions?






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






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






10. What is the normal evaporator temperature?






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






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






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






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






15. Where do you apply flux when soldering?






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






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






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






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






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






21. How is ACR tubing sized?






22. Do you need a trap on a pull-through evaporator?






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






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






25. The refrigerant within the evaporator will typically boil at what temperature when it is 75 degrees inside with a relative humidity of 50%?






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






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






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






29. Why are some ACR tubing lines insulated?






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






31. How do you calculate cfm?


32. Pressure in ductwork is measured In what?






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






34. The fan switch opens at what temperature?






35. Superheat should never be below how many degrees






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






37. Most duct insulation is made of what?






38. 7' round duct has a ballpark cfm of what?






39. What gauge is thermostat wire?






40. If the suction pressure rises - what happens to the head pressure?






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






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






43. What are the two types of blower drives?






44. How many amps can 10 g wire handle?






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






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






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






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






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






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