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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. Controlled pressure from intermediate stages of turbine






3. Rows of stationart baldes with alternating rows of moving blades






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






5. At high temperatures a material stretches






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






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






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






9. 1. written 2. spoken 3. visual






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






11. Each shaft needs a thrust bearing






12. 1. commercial establishments 2. industrail processes 3. localized central heating of small plants






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






14. 43-49 degrees C






15. U- tubes - surface areas less than 18 cubic meters - has small heat transfer surface






16. 1. activated sludge and primary sludge combined 2. heated to 37C 3. sits for 25 days 4. anaerobic bacteria breaks down organic contents 5. produces useable gases for waste heat






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






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






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






20. Calcium chloride and water - -51






21. 1. prevent wear 2. reduce friction 3. remove heat 4. reduce corrosion 5. provide sealing






22. 1. large volumes of air 2. simple and rugged 3. low maintenance






23. 1. plate 2. channel






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






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






26. 75 -000 to 100 -00 hours of operation






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






28. 5mm in diameter






29. Moisture removed by centrifugal force






30. 1. titling pad Kingsbury (journal bearing) 2. Michel thrust bearing






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






32. 'huff and puff' methods

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33. 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






34. 1. convergent 2. convergent- divergent






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






36. zeolite molecular sieve desiccant






37. Grit chambers and screens for waster water system






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






39. A thrust block that enables the axial position of the rotor to be controlled






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






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






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






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






44. 0.577 times the inlet pressure






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






46. Defined as one or more tube bundle - served by two or more fans complete with aux equipment






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






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






49. 1. Aero- derivate 2. Heavy duty






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