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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. Expensive - externally mounted - not accurate for densisty changes






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






3. Safety of the life and property






4. Current is the flow of positive charges from positive terminal of a voltage source - through the circuit and back to the negative terminal






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






6. High insulation valve - long life - vermin proof - non - corrosive - ability to retain its shape and insulation value when wet






7. 80m - due to lag - pressure drop






8. Power in watts






9. Self excited - armature fields conencted in series - initial emf depends on residual magnetism - field current is also the load current






10. Shunt - series and compound wound






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






12. Quantity of current flow is inversely proportional to the resistance for a given voltage I = E/R

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13. Useful amount of flux per pole






14. Imaginary power






15. One coulomb flowing past any section of a conductor per second






16. To ensure a supply of dry steam throughout the steam system






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






18. 3 rotor windings spaced 120 degrees apart






19. Orginate from atmospheric air - temperatures above 1500






20. 180 degrees - one pole = one pitch






21. The nature of atoms and the manner in which they behave when subjected to variuos forces and conditions






22. The flow of power pulsates






23. 125V or less to ground - 30A max






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






25. Where shock loading may occur






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






27. Fall under part IV of the controlled product regulations






28. 0.5 cubic meters (18 cubic feet)






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






30. Constang speed - if field gets disconnected during operation - field dlux drops and motor speeds up






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






32. Corrosive materials






33. Just enough oxygen for complete combustion






34. Cells that create emf using light






35. Opposition to liquid head pressure






36. Is the apparent power x power factor






37. Point level measurement used to open or close a circuit






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






39. Faults in the system causing to break up into islands - an imbalance between the generator and the load






40. Mircroprocessors - memory - inputs/outputs - terminals - power supply






41. The direction of an induced emf is always such that any current it produces opposes - trhrough its magnetic effects the charge inducing the emf

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42. Combination of shunt and series






43. Ring type joint gaskets






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






45. 1. Class A - ordinary combustibles 2. Class B - vapor- air mixtures 3. Class C - electrical 4. Class D - combustible metals






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






47. Only need 2 brushes






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






49. Unit of a fuel that is burned completely - for gas use kJ/cubic meter at standard 16 degrees at 101.3kPa






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