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. Forced or induced draft






2. Up to 60-90%






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






4. Small clearances between discs on shaft to...






5. 1. internal 2. external 3. equipment vendors 4. chemical suppliers 5. office equipement vendors






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






7. 1. charge drawn into cylinder is air only 2. fuel injected at high pressures 3. ignition due to high compression temperatuers






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






9. Use antifriction bearings






10. 'huff and puff' methods


11. 1. Split 2. double






12. No dissolved oxygen but does contain nitrates






13. Working fluid is compress then preheated in regenerator






14. 1. Pressure compounding 2. velocity compounding 3. pressure- velocity compounding






15. 1. reduce total energy bill 2. compact - les maintenance 3. short start up time 4. wide range of configurations






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






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






18. 1. need cooling water 2. low hx efficiencies 3. complex in size - increase in costs






19. 1. collection system 2. seperation pond 3. flare pit 4. stabilization lagoon 5. wastewater heater 6. 1st stage aeration tank - activated sludge 7. 2nd stage aeration tank 8. clarifiers 9. polishing pond






20. Pressure does not drop across the moving blades






21. At high temperatures a material stretches






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






23. Each shaft needs a thrust bearing






24. Most widely used - least amount of steam






25. The volum swept out by the piston - same through all stages






26. 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






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






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






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






30. 5mm in diameter






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






32. Results in pressure drop and increased velocity






33. 1. plate 2. channel






34. drum rotors on reaction turbines eliminates...






35. 1. thrust bearings 2. dummy pistions 3. thrust adjusting gear






36. Entire collection of all component


37. Does not contain dissolved oxygen






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






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






40. Equal and opposite reation


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






42. Desiccant or refrigerant 1. heatless regeneration 2. heated regeneration






43. Type of hydrometer indicating % of salt in solution






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






45. Eliminates thrust - steam admitted midway along casing






46. 'booster' compressor






47. Higher altitudes






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






49. 1. lubricate sliding surfaces 2. cool bearings






50. 1. deman reservoir 2. avoid overloading compressor 3. dampens deew point and temperature spikes rom air dryer