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






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






3. Forced or induced draft






4. zeolite molecular sieve desiccant






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






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






7. Pressure does not drop across the moving blades






8. The crankshaft and valve train






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






10. Same principle as a turbine but acting in reverse






11. 1. compression ration across compressor 2. turbine inlet temperature






12. 1. evaporator coil






13. 1. list of all equipment 2. PM checklist 3. fequency 4. repairs and costs 5. record keeping 6. cost management






14. 1. operates on a temperature difference between substances 2. warm to cold only 3. rate of transfer depends on temperature difference






15. Unit produces electricity on an ongoing basis






16. Help maintain definite thrust toward exhaust






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






18. Pressure drops across the moving blades






19. Driving rotating equipment






20. Calcium chloride and water - -51






21. A1 - A2 - A3 - B1 - B2 and B3 A = toxicity not identified under 400ppm B = toxicity identified under 400ppm 1 = not flammable 2 = low flammable limit 3 = highly flammable






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






23. 1. cooling water in direct contact 2. drains into a hotwell 3. barometric leg - condenser sits 10.34m above hotwell






24. On the exhaust side - drives the blower - being connected to the same shaft - increases power by 50-70% as more air is forced into the engine






25. Change in direction causing a turbine to move






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






27. 1. CCME 2. CEQG 3. CWQG 4. US EPA






28. Small pressure drop






29. 1. need cooling water 2. low hx efficiencies 3. complex in size - increase in costs






30. Results in pressure drop and increased velocity






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






32. Each shaft needs a thrust bearing






33. King valve






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






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






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






37. 0.577 times the inlet pressure






38. Change in momentum

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39. Higher power and speeds






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






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






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

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43. Higher altitudes






44. Have advantage of high efficiencies - 10% greater than centrifugal compressors






45. Means to come together and form one mass - removes oil and water from air






46. Use antifriction bearings






47. 1. electricial purity 2. silver nitrate - milky white






48. The condenser






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






50. 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







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Can you answer 50 questions in 15 minutes?


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