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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. Determines how much oxygen aerobic microorganisms that have been placed in the water to decompose organic matter






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






3. Unit produces electricity on an ongoing basis






4. 5mm in diameter






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






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






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






8. 1. thrust bearings 2. dummy pistions 3. thrust adjusting gear






9. As prime movers in pulp and paper industry






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






11. Pressure does not drop across the moving blades






12. 1. use clean burning fuels 2. less fuel being used - saving energy reserves 3. electrical production onsite lowers construction demands for new sites and reduces transmission line power losses






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






14. 0.577 times the inlet pressure






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






16. Straight condensing






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






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






19. DLN - reduce NOx down to 9ppm but have an increased combustion area






20. Counter act force and load on thrust bearings






21. Contains dissolved oxygen






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






23. Compression ignititon engines






24. 1. better than gantt chart 2. establishes feasible sequence 3. timetable 4. spare time plotted 5. critical activities 6. use of arrow diagrams 7. event (aka nodes) - a situation that occurs after a completed activity 8. schedule manpower efficiently






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






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






27. Used on large turbines to supply lower part of the bearing with oil to prevent metal to metal contact






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






29. Does not contain dissolved oxygen






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






31. Pressure drops across the moving blades






32. Made of cast iron and support by stay bolts to protect against a vacuum






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






34. 1. Pressure compounding 2. velocity compounding 3. pressure- velocity compounding






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






36. 1. brass 2. copper 3. cupronickel






37. Radiator type






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






39. Grit chambers and screens for waster water system






40. HFC group - zero ozone depletion - nonflammable and nonexplosive - boiling point of -26.2 - miscibility problem with minerial oil - use sythetics ester based






41. Entire collection of all component

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42. Made of steel - used for double acting pistons - acts as a piston rod






43. Large turbines with a generator on each shaft






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






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






46. Large pressure drop - increase volume to match the increase in steam volume and pressure decreases






47. Wrist pins that connect pistons to rod - retained bu circlips






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






49. Use of a rotary lobe air blower






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






Can you answer 50 questions in 15 minutes?



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