Test your basic knowledge |

Power Engineering 3

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. Corrosive materials






2. Used for combustion calculations






3. Need as many brushes as poles






4. RTD's in slots of stator windings






5. Design number followed by the provinces - the registered - the design in chronological order proceeding the decimal






6. Power in watts






7. Ranges from 42566 KJ/kg to 45350 KJ/kg






8. Causes current to lag behinde the applied voltage by 90 degrees






9. 1. anthracite 2. bituminous 3. sub- bituminous 4. lignite






10. Load current is also the excitation current - never operate without a load - has high starting torque






11. There is no relative movement between the rotor bars and teh flux of the rotating field - countacts speed changes






12. Outline the rights and responsibilites of workers and employers






13. Pulse generator operates at 3-40kHz






14. 6 times its normal full load current






15. Impact force - +- 0.5% accuracy - good in corrosive environments - up to 10000kPa and 400 degrees






16. 1. natural gas 5-10% 2. oil 5-15% 3. coal (pulverized) 15-30% 4. coal (stoker fired) 25-50%






17. Developed to replace control loops






18. A venturi tube without a diverging section - more expensive - tubes can foul and hard to install






19. High heat transfer coefficient - low density (1/4 of air) and can increase output up to 20-30% of transformer






20. 1. process 2. measurement 3. automatic controller 4. final control element






21. Aka rotameter - low cost - simple - low pressure drop - accurate






22. Economical - differential pressure due to change in centrifugal force






23. Dark brown in color - laminar structure - often with remnants of woody fibers present. Tough but not hard - when exposed to air it loses moisture rapidly and crumbles






24. Conductor being moved - 'cut' magnetic fields of flux relative to the conductor movement - using fleming's right hand rule






25. Imaginary power






26. Defined as that quantity of a substance that has a mass in kilograms equal to its molecular mass






27. 1. I/O cards 2. network 3. FCEs 4. controllers 5. operator console (OP/CON)






28. Current before voltage - capacitance load






29. 180 degrees - one pole = one pitch






30. Exactly the theoretically amount of air necessary was supplied and the combustibles were all completely burned






31. The flow of power pulsates






32. Dielectric constant (gas has a constant of 1) - provides continuous level measurement - used stored potential - no moving parts - can have erros due to change in constant - composition of material and temperature






33. 0.5 cubic meters (18 cubic feet)






34. Use of a fluidized bed of limestone reducing nitrous oxides and sulfur dioxide






35. Ground faults






36. Occurs when all of the combustibles in the fuel are completely burned - but more air than the minimum theoretically required is used (excess air)






37. Allows control from one location






38. Self starting






39. Cannot be over 75m away from building - average of 12.2m away from building






40. Operates on the principle that the resistance of metal increases in direct proportional to increases in temperature - positve co- efficient - wheatstone bridge






41. 'hops'






42. Supervisory control and data application






43. Gamma radiation






44. Depends on both the amount and time duration of the deviation - it operates until it produces exact correction






45. 1. identify probable emergencies 2. notification process (who and when) 3. determine immediate personal actions to be taken 4. minimize adverse effects on personnel - property and environment






46. Refer to pg 27.2.1 of ASME academic extract - do not interpolate between values - select next higher rated value






47. Motor control center






48. Counter emf - current limit and time limit






49. Technical document that provides details and information - health effects - hazard evaluation - measure to protect workers at risk of overexposure - emergency procedures






50. Flammables and combustibles