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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. Cool compressed air before point of use






2. Needs to a high vacuum present in system before charging






3. Results in a gain in velocity - the moving blades change direction producing force






4. 1. planning 2. implementation 3. review






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






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






7. A thrust block that enables the axial position of the rotor to be controlled






8. Control a steady backpressure - sensing element in exhuast line






9. 1. lubricate sliding surfaces 2. cool bearings






10. Condensing turbines exhaust steam at...






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






12. Entire collection of all component

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






14. Seperately forged discs or wheels and shrunk onto shaft






15. Higher altitudes






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






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






18. Centrifugal pumps






19. A concentrated solution at its critical point






20. 'huff and puff' methods

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21. Main purpose to protect the evnironment (air - water and soil) and create public awareness - involves training - monitoring and reporting






22. Calcium chloride and water - -51






23. 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






24. 1. plate 2. channel






25. Use antifriction bearings






26. Primary fuel produces high thermal energy for processes - the waste heat is used to produce electrical energy

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






28. 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






29. Results in pressure drop and increased velocity






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






31. Each stage seperated by partitions - nozzles set into diaphragms






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






33. 1. start- stop (sliding vane) 2. load- unload (rotary) 3. modulating inlet 4. mircoprocessor based control






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






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






36. 1. walnuts 2. rice 3. carbo- blase 4. offline water wash - best method






37. The crankshaft and valve train






38. 1. Split 2. double






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






40. More rounded than impulse blading






41. Air flow is horizontal






42. 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






43. Used to satisfy process steam requirements






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






45. Small pressure drop






46. Type of hydrometer indicating % of salt in solution






47. Throttle body






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






49. Most widely used - least amount of steam






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