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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. Recuperative category - high pressure






2. 1. start and stop control (reciprocating compressors) 2. variable speed (dymanic and rotary compressors) 3. constant speed (positive displacement)






3. 1. increases net power 2. clean working fluid 3. cheap fuel can be used






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






5. Chrome- iron alloy






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






7. Made of steel - used for double acting pistons - acts as a piston rod






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






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






10. Condensing turbines exhaust steam at...






11. Same principle as a turbine but acting in reverse






12. Air flow is upward






13. 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






14. 1. convergent 2. convergent- divergent






15. 1. throttle inlet valve 2. reduce compressor speed 3. automatic discharge vent line 4. anit- surge valve - reciruclation 5. anti- surge microprocessor - kickback valve






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






17. Waste heat only






18. 1. Aero- derivate 2. Heavy duty






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






20. Removal of exhaust gases by blow air through






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






22. Air drawn from atmosphere - working fluid






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






24. More rounded than impulse blading






25. Large turbines with a generator on each shaft






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






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






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






29. '3 ports' 1. intake and exhaust 2. compression and ignititon






30. 1. brass 2. copper 3. cupronickel






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






32. Throttle body






33. At high temperatures a material stretches






34. Most widely used - least amount of steam






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






36. 75 -000 to 100 -00 hours of operation






37. 1. activated sludge and primary sludge combined 2. heated to 37C 3. sits for 25 days 4. anaerobic bacteria breaks down organic contents 5. produces useable gases for waste heat






38. 1. stabilize flow through air driers 2. additional moisture seperation 3. storage capacity






39. Hydraulic cylinder or pisston on a governor






40. Pressure does not drop across the moving blades






41. U- tubes - surface areas less than 18 cubic meters - has small heat transfer surface






42. Is the ratio of the discharge pressure to the intake pressure absolute






43. 1. large volums of air at medium pressures - high speed 2. free air capacities range from 2.8 to 3700 cubic meters






44. Use of a rotary lobe air blower






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






46. 1. sliding vane 2. rotary lobe 3. rotary screw ( convex male lobes - pulse free)






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






48. Cast with special nickel based alloys - Inconel - Udimet - Waspalloy - Hastelloy






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






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