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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. Small clearances between discs on shaft to...






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






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






4. 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






5. Sagging and hogging - 20-40rpm






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






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






8. Pressure drops across the moving blades






9. 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






10. Moving blades on a rotor






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






12. 1. convergent 2. convergent- divergent






13. Cannot go below -18






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






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






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






17. Use antifriction bearings






18. Up to 60-90%






19. Radiator type






20. 1. single acting 2. double acting 3. two stage 4. tandem (first stage double acting - 2nd single) 5. free piston






21. Results in pressure drop and increased velocity






22. 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






23. Higher altitudes






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






25. 1. Gives perfect speed regulation 2. regulates turbine to a constant speed at all loads






26. Non - condensing turbine exhaust steam at...






27. Same principle as a turbine but acting in reverse






28. Throttle body






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






30. Eliminates thrust - steam admitted midway along casing






31. Atmospheric or hyperbolic






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






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






34. Air flow is horizontal






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






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






37. Increased efficiency due to decreased frictional losses






38. zeolite molecular sieve desiccant






39. Velocity increases as passes through nozzles






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






41. Reversal of flow within a compressor - rush in from discharge side sending a shock wave inside compressor






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






43. drum rotors on reaction turbines eliminates...






44. Air drawn from atmosphere - working fluid






45. Driving rotating equipment






46. Cooling of air between stages - condense below atmospheric temperature removing moisture - not primary function






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






48. Used to open and close the by- pass port in a stator - varies the volum compressed air being produced






49. Recuperative category - high pressure






50. More rounded than impulse blading