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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. Countries with small grids or specail grid requirements - has a high efficiency at base loads






2. 0.577 times the inlet pressure






3. 1. Carbon ring 2. labyrinth seal 3. water seal






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






5. Used to open and close the by- pass port in a stator - varies the volum compressed air being produced






6. Small clearances between discs on shaft to...






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






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






9. Refers to the production of power during overload demands






10. Does not contain dissolved oxygen






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






12. Polymers (polyelectrolytes)






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






14. Entire collection of all component

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






16. 1. lowers power consumption 2. load changes frequently 3. pilot valve controls loading - adjustable






17. 1. planning 2. implementation 3. review






18. 1. remove non - condensables 2. dalton's law of partial pressures 3. reciprocating or rotart pump 4. below baffles






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






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






21. 1. Split 2. double






22. The difference between the no- load and full- load speed - expressed as a %






23. Moisture removed by centrifugal force






24. Reversal of flow within a compressor - rush in from discharge side sending a shock wave inside compressor






25. Seperately forged discs or wheels and shrunk onto shaft






26. 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






27. '3 ports' 1. intake and exhaust 2. compression and ignititon






28. Equal and opposite reation

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29. Most widely used - least amount of steam






30. 1. lubricate sliding surfaces 2. cool bearings






31. Higher power and speeds






32. 'booster' compressor






33. Grit chambers and screens for waster water system






34. Counter act force and load on thrust bearings






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






36. Made of polyethylene - skimming from the surface






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






38. Recuperative category - high pressure






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






40. Meters liquid from liquid line into evaporator at a rate equal at which vaporization of liquid is occuring






41. No dissolved oxygen but does contain nitrates






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






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






44. Eliminates thrust - steam admitted midway along casing






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






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






47. Pressure drops across the moving blades






48. 1. Aero- derivate 2. Heavy duty






49. 43-49 degrees C






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