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






2. Each shaft needs a thrust bearing






3. Main purpose to protect the evnironment (air - water and soil) and create public awareness - involves training - monitoring and reporting






4. 1. written 2. spoken 3. visual






5. 'huff and puff' methods


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






7. Atmospheric or hyperbolic






8. Eliminates thrust - steam admitted midway along casing






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






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






11. zeolite molecular sieve desiccant






12. Increase pressure affecting performance of condenser but do not incresase temperature






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






14. Cannot go below -18






15. Recuperative category - high pressure






16. Used for single acting compressors






17. 1. widely used 2. single stage 3. impulse turbine






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






19. 1. vent to atmosphere 20% 2. condensing 30% 3. exhaust steam used for work 80%






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






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






22. An 'overrunning' clutch






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






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






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






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






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






28. Controlled pressure from intermediate stages of turbine






29. Moisture removed by centrifugal force






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






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






32. DLN - reduce NOx down to 9ppm but have an increased combustion area






33. Seperately forged discs or wheels and shrunk onto shaft






34. The crankshaft and valve train






35. 1. plate 2. channel






36. Change in momentum


37. Counter act force and load on thrust bearings






38. 1. Aero- derivate 2. Heavy duty






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






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






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






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






43. Type of hydrometer indicating % of salt in solution






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






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






46. Unit produces electricity on an ongoing basis






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






48. Servomotors






49. CFC group - safe nontoxic - but long atmospheric life span of 100 years - boiling point of -29.8






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