Test your basic knowledge |

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






2. Good thermal properties - boiling point of -33.3 - pure anhydrous ammonia is noncorrosive - cheap - not miscible in oil - toxic






3. Too small to settle out - add floc






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






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






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






7. Recuperative category - high pressure






8. Refers only to specificly to the turbine section

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9. 1. high power to weight ration 2. use of different liquids and gaseous fuels 3. start rapidly 4. simple and compact design 5. reliable 6. remote operation






10. 1. convergent 2. convergent- divergent






11. 1. Split 2. double






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






13. Sagging and hogging - 20-40rpm






14. 1. oil reservoir 2. filters 3. pumps 4. coolers 5. protective monitoring devices






15. Results in pressure drop and increased velocity






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






17. Controlled pressure from intermediate stages of turbine






18. 1. remove non - condensables 2. dalton's law of partial pressures 3. reciprocating or rotart pump 4. below baffles






19. Air flow is horizontal






20. Air drawn from atmosphere - working fluid






21. 1. Pressure compounding 2. velocity compounding 3. pressure- velocity compounding






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






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






24. Removal of exhaust gases by blow air through






25. 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






26. Polymers (polyelectrolytes)






27. 1. lowers power consumption 2. load changes frequently 3. pilot valve controls loading - adjustable






28. Quantity ofr compressed air and delivered air by the compressor






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






30. Large turbines couple together on a single shaft applied to one generator






31. Chrome- iron alloy






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






33. 1. Flyweights 2. coutner spring 3. function based on centrifugal force






34. More rounded than impulse blading






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






36. Higher altitudes






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






38. Large turbines with a generator on each shaft






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






40. 1. written 2. spoken 3. visual






41. Same principle as a turbine but acting in reverse






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






43. Reduces steam pressure and velocity in two or more steps






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






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






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






47. Servomotors






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






49. Reduction of NOx through ammonia injection priot to catalyst - lowering NOx to 10ppm






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