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






2. Atmospheric or hyperbolic






3. 1. individual pump system 2. distributor system 3. common rail system






4. Results in pressure drop and increased velocity






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






6. The utilization of one form of input energy to generate two or more forms of output energy






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






8. Most widely used - least amount of steam






9. As prime movers in pulp and paper industry






10. More rounded than impulse blading






11. Waste heat only






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






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






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






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






16. Refers to the production of power during overload demands






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






18. Use antifriction bearings






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






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






21. Velocity increases as passes through nozzles






22. 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






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






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






25. Air drawn from atmosphere - working fluid






26. Type of hydrometer indicating % of salt in solution






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






28. 5mm in diameter






29. 75 -000 to 100 -00 hours of operation






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






31. CFC group - safe nontoxic - but long atmospheric life span of 100 years - boiling point of -29.8






32. Throttle body






33. An 'overrunning' clutch






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






35. Moisture removed by centrifugal force






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






37. King valve






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






39. 'huff and puff' methods

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40. 43-49 degrees C






41. Use of a rotary lobe air blower






42. Desiccant or refrigerant 1. heatless regeneration 2. heated regeneration






43. Large turbines couple together on a single shaft applied to one generator






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






45. 1. widely used 2. single stage 3. impulse turbine






46. Controlled pressure from intermediate stages of turbine






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






48. 1. charge drawn into cylinder is air only 2. fuel injected at high pressures 3. ignition due to high compression temperatuers






49. Refers only to specificly to the turbine section

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