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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. 1. pneumatic 2. electronic 3. optical






2. The sum of individual current through each loop or path are equal to the total current






3. The effective value of current and voltage - apparent power






4. Liquid being measured must be able to mix with the gas or air in the bubbler






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






6. Direction and intensity of the current flow






7. Oscillate - on - off control behavior






8. In AC it is equal to the effective current x voltage - only when in phase






9. 1. isolation from upsets 2. improves loop dynamics 3. removes valve charcteristics from the influences 4. second loop provides exact control






10. Terminal voltage decreases with increase of lead - field weakened by reduction of emf and it depends on the residual magnetism in the field circuit






11. Occurs when some of the elements pass to the stack






12. Casues the neutral plane within whcih brushes have been placed to shift - so that the brushes are now shorting the coils - which produce voltage (sparking) - use interpoles to neutralize condition






13. One controlled variable and two manipulated variable as output - 'Duplex Controlres






14. The offset of a proportional controller decreases to maintain SP






15. Poisonous and infectious materials






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






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






18. % moisture - fixed carbon






19. Storage facility not required - Clean burning - no ash - Stack emission are relatively clean - Easily mixed with air - Does not require any extensive handling equipment - Easy to control






20. Is the current in any line voltage - phase volts






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






22. 6 times its normal full load current






23. Allows control from one location






24. Ground faults






25. Supervisory control and data application






26. Equal to the charge on 6.242 x 10 to 18th power of electrons - quantity of electricity






27. Self starting






28. Salient and cylindrical






29. Low accuracy at low velocities - can plug with certain fluids - sensitive to local disturbances






30. Can act as an induction motor - 3 directional inverse time overcurrent relays






31. Prevents/dampens external vibration






32. Produces sticky - cohesive mass when heated - carbon content is lower than anthracite - but volatile matter content is higher.






33. Wander erratically






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






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






36. Arc range of 270 degrees






37. Power in watts






38. 'hops'






39. The fule - the method of firing - the burner and furnace design and load on boiler






40. Organically bound component of the fuel






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






42. Range of 250mm water to 350kPa






43. Magnetic flux produced by one coil that cuts the lines of the conductors of the second coil - creating a voltage induced in the second coil






44. Imaginary power






45. Used to linearize the measurement signal






46. Help reverse the current int eh coil passing under the brushes - commutations






47. Controller output is above minimum value when error is zero






48. AC drivers/inverters - solid stated devices and have a low power conversion for losses






49. Can have a leading PF - lowering the plant energy costs






50. Is the free electrons that are attracted by the positive terminal of thevoltage supply and will flow out continuously from the negative terminal