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






2. Supply and demand control






3. Feeds current to or from the armature's conductors






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






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






6. More expensive - Involves the use of long large diameter pipelines - Hydrogen content in gas decreases the efficiency of combustion. Each kg of hydrogen produces 9 kg of water






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






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






9. 1. wet pipe 2. dry pipe 3. preaction - double interlocked 4. combination of dry and preaction 5. deluge






10. Ring type joint gaskets






11. The amount of power that can be dissipated by the resistor without affecting its characteristics - speicifc to 20 degrees






12. 1. dry barrel - valve located below the frost line 2. wet barrel






13. RMS; AC voltage that equals DC voltage that will do the same amount of work. For an AC sine wave it is 0.707 x peak voltage. Effective value






14. 85% or less of normal value power






15. Current before voltage - capacitance load






16. Higher heating values include the latent heat of the water vapor in the products of combustion






17. Produces heavy residuals that may be suitable as fuel known as coke






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






19. 1. line impedance starters - resistance in series for each phase 2. star- delta - using a special switch - inexpensive - current surge 3. auto- transformer - expensive - best starting torque






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






21. Voltage and current reach their max values at the same time

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22. Orginate from atmospheric air - temperatures above 1500






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






24. 1. carbon 2. hydrogen 3. sulphur






25. Break contact with the line side first - line side first when installing






26. Propellar- like - flat disc wobbles to turn gear (water meter applications)






27. 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






28. Operates to prevent errors






29. Pancake or concentric






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






31. Smallest cross sectional area






32. The rate (derivative control) will counter it and allow the proportional band and integral begin earlier






33. RTD's in slots of stator windings






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






35. Alternators






36. Developed to replace control loops






37. 1. product identifier 2.hazard symbol 3. risk phases 4. precautionary statement 5. fist aid 6. supplier information 7. reference to MSDS






38. P = 1(squared)R






39. Contains 1 kg of oxygen






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






41. Has a high magnetic reluctance






42. Organically bound component of the fuel






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






44. Calorifc value formula






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






46. Is the total opposition - Z






47. 80m - due to lag - pressure drop






48. Interest of workers - employers - suppliers - regulators






49. Supervisory control and data application






50. Where shock loading may occur