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






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






3. The crankshaft and valve train






4. Pressure does not drop across the moving blades






5. Higher altitudes






6. 'huff and puff' methods

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7. 1. planning 2. implementation 3. review






8. Refers to the production of power during overload demands






9. Hydraulic cylinder or pisston on a governor






10. Radiator type






11. 1. lubricate sliding surfaces 2. cool bearings






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






13. drum rotors on reaction turbines eliminates...






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






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






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






17. 1. contact - 'jet' 2. surface






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






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






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






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






22. Servomotors






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






24. Large turbines with a generator on each shaft






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






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






27. Compression ignititon engines






28. Most widely used - least amount of steam






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






30. Use antifriction bearings






31. An 'overrunning' clutch






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






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






34. 1. compressor section 2. combustor 3. turbine section






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






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






37. Each shaft needs a thrust bearing






38. Pressure drops across the moving blades






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






40. Atmospheric or hyperbolic






41. Air flow is upward






42. 1. electricial purity 2. silver nitrate - milky white






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






44. 1. commercial establishments 2. industrail processes 3. localized central heating of small plants






45. Controlled pressure from intermediate stages of turbine






46. Air drawn from atmosphere - working fluid






47. Chrome- iron alloy






48. 75 -000 to 100 -00 hours of operation






49. Used to open and close the by- pass port in a stator - varies the volum compressed air being produced






50. Made of steel - used for double acting pistons - acts as a piston rod