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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. Needs to a high vacuum present in system before charging






2. Integral part of the governing system - in the front end and engages at 10-12% above normal operating speed






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






4. 1. verticle cyclinder 2. cabin heater 3. central tube wall






5. Attempting to pick up a load - turbines in parallel






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






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






8. Higher power and speeds






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






10. 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






11. Refers to the production of power during overload demands






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






13. 1. inlet to the convection section 2. betwen convection and radiant section 3. at radiant section outlet






14. 43-49 degrees C






15. HCFC group - miscible in oil - boiling point of -40.8 but can be used down to -87






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






17. Air drawn from atmosphere - working fluid






18. 1. start- stop (sliding vane) 2. load- unload (rotary) 3. modulating inlet 4. mircoprocessor based control






19. Sagging and hogging - 20-40rpm






20. Grit chambers and screens for waster water system






21. 1. simple design 2. less piping 3. no freezing hazard






22. Help maintain definite thrust toward exhaust






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






24. 1. lubricate sliding surfaces 2. cool bearings






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






26. Small pressure drop






27. Reduces steam pressure and velocity in two or more steps






28. Waste heat only






29. Air flow is horizontal






30. Either fixed production or varying






31. 1. planning 2. implementation 3. review






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






33. More rounded than impulse blading






34. Control a steady backpressure - sensing element in exhuast line






35. Pressure drops across the moving blades






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






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






38. Too small to settle out - add floc






39. Requires annual review of SOPs






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






41. Eliminates thrust - steam admitted midway along casing






42. Independant of the governor - inductive sensor (magnetic speed pickups)






43. 1. high pressure cutout 2. oil pressure cutout 3. pressure relief devices






44. 1. titling pad Kingsbury (journal bearing) 2. Michel thrust bearing






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






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






47. To remove and properly dispose of pollutants






48. Used to satisfy process steam requirements






49. 1. air compressed to 1100-3000kPa 2. combustion at 2000C 3. mixed with air - cooled to 918C on exit 4. combustor gases go to turbine 5. gases from turbine leave at atmospheric pressure and 500-640C






50. Used for single acting compressors