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






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






3. Hydraulic cylinder or pisston on a governor






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






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






6. Atmospheric or hyperbolic






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






8. 1. Gives perfect speed regulation 2. regulates turbine to a constant speed at all loads






9. Waste heat only






10. Up to 60-90%






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






12. Moisture removed by centrifugal force






13. Pressure drops across the moving blades






14. 1. low power consumption 2. frequent load changes 3. adjustable 4. suction valve change easily






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






16. Used for single acting compressors






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






18. A concentrated solution at its critical point






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






20. Good thermal properties - boiling point of -33.3 - pure anhydrous ammonia is noncorrosive - cheap - not miscible in oil - toxic






21. No dissolved oxygen but does contain nitrates






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






23. Overall master plan - comprehensive program






24. 1. Condensing 2. non - condensing (backpressure)






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






26. Help maintain definite thrust toward exhaust






27. Have advantage of high efficiencies - 10% greater than centrifugal compressors






28. Air flow is horizontal






29. More rounded than impulse blading






30. As prime movers in pulp and paper industry






31. Use of a rotary lobe air blower






32. Use teflon or carbon to lubricate system






33. Cause high discharge pressures - more power requirements - reduces capacity






34. Each shaft needs a thrust bearing






35. Higher power and speeds






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






37. Too small to settle out - add floc






38. Seperately forged discs or wheels and shrunk onto shaft






39. HCFC group - miscible in oil - boiling point of -40.8 but can be used down to -87






40. 1. oil reservoir 2. filters 3. pumps 4. coolers 5. protective monitoring devices






41. 1. intake 2. compression 3. power 4. exhaust






42. Requires annual review of SOPs






43. Condensing turbines exhaust steam at...






44. Grit chambers and screens for waster water system






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






46. Counter act force and load on thrust bearings






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






48. Moving blades on a rotor






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






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







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