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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. One or more tube bundles - in one or more bays for an individual service or process






2. Higher power and speeds






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






4. The crankshaft and valve train






5. 1. collection system 2. seperation pond 3. flare pit 4. stabilization lagoon 5. wastewater heater 6. 1st stage aeration tank - activated sludge 7. 2nd stage aeration tank 8. clarifiers 9. polishing pond






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






7. KW at 15C standard at sealevel with 60% RH






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






9. Cool compressed air before point of use






10. Requires annual review of SOPs






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






12. Condensing turbines exhaust steam at...






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






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






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






16. 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






17. 1. lubricate sliding surfaces 2. cool bearings






18. Waste heat only






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






20. '3 ports' 1. intake and exhaust 2. compression and ignititon






21. 1. kettle 2. thermosyphon horizontal 3. thermosyphon vertical






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






23. 1. Responsive to speed changes 2. responsive to pressurre changes






24. Seperately forged discs or wheels and shrunk onto shaft






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






26. 1. compressor discharge 2. condenser 3. liquid receiver






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






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






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






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






31. More rounded than impulse blading






32. Recuperative category - high pressure






33. 43-49 degrees C






34. Has steam directed through baffles making 4 passes






35. Used for single acting compressors






36. 1. brass 2. copper 3. cupronickel






37. 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






38. 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






39. 1. Difference in pressure across moving blades 2. steam leaks around edges 3. minimal blade clearances 4. unbalanced thrust






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






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






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






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

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






45. Most widely used - least amount of steam






46. Air drawn from atmosphere - working fluid






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






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






49. Centrifugal pumps






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