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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. Centrifugal pumps






2. Either fixed production or varying






3. 1. reduce total energy bill 2. compact - les maintenance 3. short start up time 4. wide range of configurations






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






5. Requires annual review of SOPs






6. A group of one or more bays - including one or more units arranged in a single or continuous structure






7. 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






8. 1. large volumes of air 2. simple and rugged 3. low maintenance






9. 1. Single flow 2. double flow 3. automatic extraction 4. backpressure






10. Same principle as a turbine but acting in reverse






11. Eliminates thrust - steam admitted midway along casing






12. Atmospheric or hyperbolic






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






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






15. Ground water monitoring device






16. Results in pressure drop and increased velocity






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






18. Hydraulic cylinder or pisston on a governor






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






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






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






22. 1. control range of 0 to 100% load 2. energy efficient






23. Non - condensing turbine exhaust steam at...






24. Large turbines with a generator on each shaft






25. A1 - A2 - A3 - B1 - B2 and B3 A = toxicity not identified under 400ppm B = toxicity identified under 400ppm 1 = not flammable 2 = low flammable limit 3 = highly flammable






26. Recuperative category - high pressure






27. Discharge steam when excessive backpressure exists






28. The volum swept out by the piston - same through all stages






29. 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






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






31. Use antifriction bearings






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






33. Cannot go below -18






34. The utilization of one form of input energy to generate two or more forms of output energy






35. 1. prevent wear 2. reduce friction 3. remove heat 4. reduce corrosion 5. provide sealing






36. Has steam directed through baffles making 4 passes






37. Forced or induced draft






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






39. 1. Aero- derivate 2. Heavy duty






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






41. Up to 60-90%






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. 1. lubricate sliding surfaces 2. cool bearings






44. 'booster' compressor






45. Calcium chloride and water - -51






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






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






48. 5mm in diameter






49. To remove and properly dispose of pollutants






50. 1. charge drawn into cylinder is air only 2. fuel injected at high pressures 3. ignition due to high compression temperatuers