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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. 1. bare tube 2. finned tube 3. plate surface - a vacuum exists between plates






3. Moderate compression ratio - giving improved volumetric efficiency - but not lower discharge air temperature






4. Pressure drops across the moving blades






5. 1. ferrules 2. metallic and fiber packing 3. roll expanding 4. combination - inlet end expanded and belled - outlet pakced or ferruled






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






7. 1. lubricate sliding surfaces 2. cool bearings






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






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






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






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






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






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






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






15. 1. brass 2. copper 3. cupronickel






16. Simple generator - light - no battery - hotter spark at higher speeds






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






18. Up to 60-90%






19. Either fixed production or varying






20. Change in momentum


21. Air flow is upward






22. Fall under provincal boiler pressure regualtions - wcb and local fire marshall regulation and insurance company - need log book - safety device testing records






23. Change in direction causing a turbine to move






24. 1. planning 2. implementation 3. review






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


26. 1. verticle cyclinder 2. cabin heater 3. central tube wall






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






28. Does not contain dissolved oxygen






29. Moving blades on a rotor






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






31. Increase pressure affecting performance of condenser but do not incresase temperature






32. Use teflon or carbon to lubricate system






33. Compression ignititon engines






34. Working fluid is compress then preheated in regenerator






35. 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






36. Eliminates thrust - steam admitted midway along casing






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






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






39. 1. activated sludge 2. rotating biological contactors 3. trickling filters






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






41. The change in sped that resutls from an increase in load






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






43. 1. compressor section 2. combustor 3. turbine section






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






45. Polymers (polyelectrolytes)






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






47. At high temperatures a material stretches






48. zeolite molecular sieve desiccant






49. 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






50. 'huff and puff' methods