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. If pressure rises - what happens to the superheat?






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






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






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






5. How will too much refrigerant effect superheat?






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






7. The fan switch opens at what temperature?






8. What is the normal evaporator temperature?






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






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






11. How do you calculate EER?






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






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






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






15. 13 SEER is classified as what kind of efficiency?






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






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






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






19. What are the two types of package units?






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






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






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






23. Why are some ACR tubing lines insulated?






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






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






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






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






28. What do you use to check for leaks?






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






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






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






32. How do you achieve high-efficiency?






33. How does ACR copper pipe come?






34. Can refrigerant line sets be altered in length?






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






36. At what temperature will brazing melt?






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






38. What is a package unit?






39. How many amps can 14 g wire handle?






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






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






42. What do you use to connect square and rectangular ductboard together?






43. What distributes supply air to a room in a structure?






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






45. 10 SEER is classified as what kind of efficiency?






46. Do you need a vent on a push-through evaporator?






47. How many cfm per ton?






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






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






50. The fan switch closes at what temperature?