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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. 1. to increase steam production 2. control superheater temperatures 3. meet process demands






2. Use teflon or carbon to lubricate system






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






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






5. Control a steady backpressure - sensing element in exhuast line






6. 1. activated sludge 2. rotating biological contactors 3. trickling filters






7. Small pressure drop






8. 1. vent to atmosphere 20% 2. condensing 30% 3. exhaust steam used for work 80%






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






10. Each stage seperated by partitions - nozzles set into diaphragms






11. 5mm in diameter






12. More rounded than impulse blading






13. Seperately forged discs or wheels and shrunk onto shaft






14. 1. thrust bearings 2. dummy pistions 3. thrust adjusting gear






15. 1. sliding vane 2. rotary lobe 3. rotary screw ( convex male lobes - pulse free)






16. Very high speed with extremely high centrigufal force and high frictional losses






17. Has the highest level of thermal efficiency - low capital costs - fast start up - quick to build - low maint cost






18. Calcium chloride and water - -51






19. Counter act force and load on thrust bearings






20. Air drawn from atmosphere - working fluid






21. 1. increases net power 2. clean working fluid 3. cheap fuel can be used






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






23. 1. high pressure cutout 2. oil pressure cutout 3. pressure relief devices






24. Dry surface coolers - no contact convection hx - aka finned tube exchangers






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






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






27. Refers only to specificly to the turbine section

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28. Forced or induced draft






29. Sagging and hogging - 20-40rpm






30. Air flow is horizontal






31. Monel metal - high tensile strength - nickel copper alloy






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






33. No dissolved oxygen but does contain nitrates






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






35. 1. CCME 2. CEQG 3. CWQG 4. US EPA






36. Equal and opposite reation

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






38. Admirally brass or Munte metal - 25-40mm thick






39. 1. verticle cyclinder 2. cabin heater 3. central tube wall






40. Reduces steam pressure and velocity in two or more steps






41. 1. contact - 'jet' 2. surface






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






43. 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






44. Up to 60-90%






45. 1. deman reservoir 2. avoid overloading compressor 3. dampens deew point and temperature spikes rom air dryer






46. Change in momentum

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47. Higher power and speeds






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






49. Removal of exhaust gases by blow air through






50. The space wherein the liquid refrigerant absorbs heat and boils







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Can you answer 50 questions in 15 minutes?


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