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






2. Admirally brass or Munte metal - 25-40mm thick






3. 1. to increase steam production 2. control superheater temperatures 3. meet process demands






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






5. '3 ports' 1. intake and exhaust 2. compression and ignititon






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






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






8. Compression ignititon engines






9. Controlled pressure from intermediate stages of turbine






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






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






12. Moisture removed by centrifugal force






13. Use antifriction bearings






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






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






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






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






18. Either fixed production or varying






19. Has steam directed through baffles making 4 passes






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






21. Air flow is upward






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






23. Unit produces electricity on an ongoing basis






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






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






26. Used to satisfy process steam requirements






27. Determines how much oxygen aerobic microorganisms that have been placed in the water to decompose organic matter






28. 1. evaporator coil






29. 5mm in diameter






30. 75 -000 to 100 -00 hours of operation






31. 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






32. Forced or induced draft






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






34. Center- to- center distance between baffles






35. 1. Responsive to speed changes 2. responsive to pressurre changes






36. 1. written 2. spoken 3. visual






37. Pieces left on tips of turbine blading so the shrouding canbe attached to correspond with strips






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






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






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






41. 1. use clean burning fuels 2. less fuel being used - saving energy reserves 3. electrical production onsite lowers construction demands for new sites and reduces transmission line power losses






42. As prime movers in pulp and paper industry






43. Radiator type






44. 1. brass 2. copper 3. cupronickel






45. 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






46. Centrifugal pumps






47. Pressure does not drop across the moving blades






48. 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






49. 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






50. Small pressure drop