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. Has the highest level of thermal efficiency - low capital costs - fast start up - quick to build - low maint cost






2. zeolite molecular sieve desiccant






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






4. 1. compression ration across compressor 2. turbine inlet temperature






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






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






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






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






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






10. Recuperative category - high pressure






11. 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






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






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






14. Used to satisfy process steam requirements






15. 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






16. Most widely used - least amount of steam






17. Contains dissolved oxygen






18. King valve






19. drum rotors on reaction turbines eliminates...






20. Working fluid is compress then preheated in regenerator






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






22. 1. can - annular 2. annular 3. single- can






23. 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






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






25. Requires annual review of SOPs






26. '3 ports' 1. intake and exhaust 2. compression and ignititon






27. 1. planning 2. implementation 3. review






28. The condenser






29. 1. inlet vane 2. electro- pneumatic control 3. microprocessor based control






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






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






32. Made of polyethylene - skimming from the surface






33. 5mm in diameter






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






35. Cool compressed air before point of use






36. Increased efficiency due to decreased frictional losses






37. 1. Carbon ring 2. labyrinth seal 3. water seal






38. Radiator type






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






40. Air flow is horizontal






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






42. 0.577 times the inlet pressure






43. HFC group - zero ozone depletion - nonflammable and nonexplosive - boiling point of -26.2 - miscibility problem with minerial oil - use sythetics ester based






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






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






46. Nickel steel - strong fully balanced rotor - expensive






47. Center- to- center distance between baffles






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






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






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