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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. Refers to the production of power during overload demands






2. Air flow is upward






3. Cause high discharge pressures - more power requirements - reduces capacity






4. Unit produces electricity on an ongoing basis






5. Cool compressed air before point of use






6. Condensing turbines exhaust steam at...






7. Use teflon or carbon to lubricate system






8. Has steam directed through baffles making 4 passes






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






10. Moisture removed by centrifugal force






11. '3 ports' 1. intake and exhaust 2. compression and ignititon






12. No dissolved oxygen but does contain nitrates






13. Large pressure drop - increase volume to match the increase in steam volume and pressure decreases






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






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






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






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






18. More rounded than impulse blading






19. The difference between the no- load and full- load speed - expressed as a %






20. 1. Nozzle - impulse turbine only 2. throttle - reaction turbine only 3. bypass or overload - used on both turbines






21. Driving rotating equipment






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






23. 1. low power consumption 2. frequent load changes 3. adjustable 4. suction valve change easily






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






25. 1. Aero- derivate 2. Heavy duty






26. 1. evaporator coil






27. Requires annual review of SOPs






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






29. 'huff and puff' methods

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30. The crankshaft and valve train






31. Direct prosses applications - absorption refrigeration - heat recovery boiler






32. zeolite molecular sieve desiccant






33. Wrist pins that connect pistons to rod - retained bu circlips






34. Pressure does not drop across the moving blades






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






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






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






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






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






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






41. Higher power and speeds






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






43. At high temperatures a material stretches






44. Does not contain dissolved oxygen






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






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






47. Forced or induced draft






48. Throttle body






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






50. Moving blades on a rotor