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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. Direct prosses applications - absorption refrigeration - heat recovery boiler






2. Most widely used - least amount of steam






3. Air drawn from atmosphere - working fluid






4. Equal and opposite reation

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5. KW at 15C standard at sealevel with 60% RH






6. A group of one or more bays - including one or more units arranged in a single or continuous structure






7. Discharge steam when excessive backpressure exists






8. Small pressure drop






9. Change in momentum

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






11. Centrifugal pumps






12. 1. lubricate sliding surfaces 2. cool bearings






13. Sagging and hogging - 20-40rpm






14. Results in a gain in velocity - the moving blades change direction producing force






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






16. 1. convergent 2. convergent- divergent






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






18. A concentrated solution at its critical point






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






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






21. Monel metal - high tensile strength - nickel copper alloy






22. 1. walnuts 2. rice 3. carbo- blase 4. offline water wash - best method






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






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






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






26. Air flow is horizontal






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






28. Change in direction causing a turbine to move






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






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






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






32. Steam expands and pressure drops as it passes through moving blades - unbalance pressure






33. 1. compressor discharge 2. condenser 3. liquid receiver






34. Condensing turbines exhaust steam at...






35. 1. kettle 2. thermosyphon horizontal 3. thermosyphon vertical






36. Very high speed with extremely high centrigufal force and high frictional losses






37. Good thermal properties - boiling point of -33.3 - pure anhydrous ammonia is noncorrosive - cheap - not miscible in oil - toxic






38. Working fluid is compress then preheated in regenerator






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






40. zeolite molecular sieve desiccant






41. Produce and maintain a vacuum at the turbine exhaust allowing steam to expand to a lower pressure and do more work






42. Up to 60-90%






43. Use antifriction bearings






44. 1. operates on a temperature difference between substances 2. warm to cold only 3. rate of transfer depends on temperature difference






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






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






47. Means to come together and form one mass - removes oil and water from air






48. Chrome- iron alloy






49. Too small to settle out - add floc






50. Primary fuel produces high thermal energy for processes - the waste heat is used to produce electrical energy

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