Test your basic knowledge |

Power Engineering 2

Subject : engineering
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. 1. thrust bearings 2. dummy pistions 3. thrust adjusting gear






2. Air flow is horizontal






3. A group of one or more bays - including one or more units arranged in a single or continuous structure






4. A verticle well is used to increase the NPSH - gives better performance and less cavitation






5. Refers to the production of power during overload demands






6. To remove and properly dispose of pollutants






7. No dissolved oxygen but does contain nitrates






8. Pieces left on tips of turbine blading so the shrouding canbe attached to correspond with strips






9. Contains 0.5kg of moisture for every 28 cubic meter of air






10. Independant of the governor - inductive sensor (magnetic speed pickups)






11. Quantity ofr compressed air and delivered air by the compressor






12. Unit produces electricity on an ongoing basis






13. Use antifriction bearings






14. Each shaft needs a thrust bearing






15. Recuperative category - high pressure






16. Increased efficiency due to decreased frictional losses






17. 1. high manufacturing costs 2. slow speed changes 3. low efficiencies at low throttle






18. CFC group - safe nontoxic - but long atmospheric life span of 100 years - boiling point of -29.8






19. Means to come together and form one mass - removes oil and water from air






20. Refers only to specificly to the turbine section


21. 1. ferrules 2. metallic and fiber packing 3. roll expanding 4. combination - inlet end expanded and belled - outlet pakced or ferruled






22. Too small to settle out - add floc






23. 1. backpressure 2. condensate levels 3. contanimation 4. vacuum pay- off relays (10 to 40kPa) 5. vacuum trip relays (50kPa)






24. 1. inlet to the convection section 2. betwen convection and radiant section 3. at radiant section outlet






25. Main purpose to protect the evnironment (air - water and soil) and create public awareness - involves training - monitoring and reporting






26. The volum swept out by the piston - same through all stages






27. 1. large volums of air at medium pressures - high speed 2. free air capacities range from 2.8 to 3700 cubic meters






28. 1. can - annular 2. annular 3. single- can






29. King valve






30. 1. throttle inlet valve 2. reduce compressor speed 3. automatic discharge vent line 4. anit- surge valve - reciruclation 5. anti- surge microprocessor - kickback valve






31. Direct contact type - uses converging nozzles and in moderate vacuum






32. 1. walnuts 2. rice 3. carbo- blase 4. offline water wash - best method






33. 1. inlet vane 2. electro- pneumatic control 3. microprocessor based control






34. Calcium chloride and water - -51






35. 1. need cooling water 2. low hx efficiencies 3. complex in size - increase in costs






36. Integral part of the governing system - in the front end and engages at 10-12% above normal operating speed






37. 1. lubricate sliding surfaces 2. cool bearings






38. HFC group - zero ozone depletion - nonflammable and nonexplosive - boiling point of -26.2 - miscibility problem with minerial oil - use sythetics ester based






39. 1. written 2. spoken 3. visual






40. 1. bare tube 2. finned tube 3. plate surface - a vacuum exists between plates






41. Direct prosses applications - absorption refrigeration - heat recovery boiler






42. Large turbines with a generator on each shaft






43. Reduction of NOx through ammonia injection priot to catalyst - lowering NOx to 10ppm






44. DLN - reduce NOx down to 9ppm but have an increased combustion area






45. 1. control range of 0 to 100% load 2. energy efficient






46. Servomotors






47. 1. high power to weight ration 2. use of different liquids and gaseous fuels 3. start rapidly 4. simple and compact design 5. reliable 6. remote operation






48. Set of stationary nozzles and 2 sets of rotating blades - pressure drop occurs in stationary blades






49. Made of polyethylene - skimming from the surface






50. Condensing turbines exhaust steam at...