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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. Change in momentum

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2. Higher power and speeds






3. Simple generator - light - no battery - hotter spark at higher speeds






4. 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






5. 1. simple design 2. less piping 3. no freezing hazard






6. 1. Single flow 2. double flow 3. automatic extraction 4. backpressure






7. Refers to the production of power during overload demands






8. KW at 15C standard at sealevel with 60% RH






9. Used on large turbines to supply lower part of the bearing with oil to prevent metal to metal contact






10. Steam expands and pressure drops as it passes through moving blades - unbalance pressure






11. Results in a gain in velocity - the moving blades change direction producing force






12. Atmospheric or hyperbolic






13. 1. collection system 2. seperation pond 3. flare pit 4. stabilization lagoon 5. wastewater heater 6. 1st stage aeration tank - activated sludge 7. 2nd stage aeration tank 8. clarifiers 9. polishing pond






14. 1. internal 2. external 3. equipment vendors 4. chemical suppliers 5. office equipement vendors






15. Each shaft needs a thrust bearing






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






17. 1. evaporator coil






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






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






20. Ground water monitoring device






21. Is the ratio of the discharge pressure to the intake pressure absolute






22. Large pressure drop - increase volume to match the increase in steam volume and pressure decreases






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






24. Servomotors






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






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






27. Produce and maintain a vacuum at the turbine exhaust allowing steam to expand to a lower pressure and do more work






28. 1. plate 2. channel






29. 1. written 2. spoken 3. visual






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






31. Moisture removed by centrifugal force






32. Non - condensing turbine exhaust steam at...






33. Forced or induced draft






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






35. Too small to settle out - add floc






36. One or more tube bundles - in one or more bays for an individual service or process






37. 1. Difference in pressure across moving blades 2. steam leaks around edges 3. minimal blade clearances 4. unbalanced thrust






38. Determines how much oxygen aerobic microorganisms that have been placed in the water to decompose organic matter






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






40. Air drawn from atmosphere - working fluid






41. Primary fuel produces high thermal energy for processes - the waste heat is used to produce electrical energy

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






43. 1. better than gantt chart 2. establishes feasible sequence 3. timetable 4. spare time plotted 5. critical activities 6. use of arrow diagrams 7. event (aka nodes) - a situation that occurs after a completed activity 8. schedule manpower efficiently






44. 'booster' compressor






45. 1. charge drawn into cylinder is air only 2. fuel injected at high pressures 3. ignition due to high compression temperatuers






46. 1. spray 2. fog 3. special evaporator pads






47. 1. start- stop (sliding vane) 2. load- unload (rotary) 3. modulating inlet 4. mircoprocessor based control






48. Moving blades on a rotor






49. Air flow is upward






50. Cooling of air between stages - condense below atmospheric temperature removing moisture - not primary function