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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. A concentrated solution at its critical point






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






3. 1. reduce total energy bill 2. compact - les maintenance 3. short start up time 4. wide range of configurations






4. Refers to the production of power during overload demands






5. 1. start and stop control (reciprocating compressors) 2. variable speed (dymanic and rotary compressors) 3. constant speed (positive displacement)






6. Center- to- center distance between baffles






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






8. Removal of exhaust gases by blow air through






9. Fuel supplied firstg produces electrcial power with thermal energy as a by- product

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10. 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






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






12. 1. single acting 2. double acting 3. two stage 4. tandem (first stage double acting - 2nd single) 5. free piston






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






14. Seperately forged discs or wheels and shrunk onto shaft






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






16. Discharge steam when excessive backpressure exists






17. More rounded than impulse blading






18. Help maintain definite thrust toward exhaust






19. Change in momentum

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






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






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






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






24. Air flow is upward






25. 1. air compressed to 1100-3000kPa 2. combustion at 2000C 3. mixed with air - cooled to 918C on exit 4. combustor gases go to turbine 5. gases from turbine leave at atmospheric pressure and 500-640C






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






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






28. 5mm in diameter






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






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






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






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

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33. Change in direction causing a turbine to move






34. King valve






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






36. 43-49 degrees C






37. Calcium chloride and water - -51






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






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






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






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






42. 1. stabilize flow through air driers 2. additional moisture seperation 3. storage capacity






43. Attempting to pick up a load - turbines in parallel






44. 1. Nozzle - impulse turbine only 2. throttle - reaction turbine only 3. bypass or overload - used on both turbines






45. 1. Split 2. double






46. Small pressure drop






47. 'huff and puff' methods

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






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






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







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