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






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






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






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






5. Pancake or concentric






6. 1. pneumatic 2. electronic 3. optical






7. Establish rules of safety covering the design - fabrication - and inspection during construction of boilers and pressure vessels - and to interpret these rules when questions arise






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






9. Flammables and combustibles






10. Imaginary power






11. Lowers wasted heat - lowers power requriements for forced draft and induced draft fans






12. Controls current to fields






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






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






15. Work to elimate errors






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






17. The technology used to transmit signals from one loop device to another






18. Counter emf - current limit and time limit






19. Useful amount of flux per pole






20. Contains 1 kg of oxygen






21. 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






22. Shunt - series and compound wound






23. Have 2 conductors - example is telephone and radio currents






24. Large disturnbance and frequency could cause loop not to work properly - processes with large lag will not control






25. Arc range of 270 degrees






26. Is the total opposition - Z






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






28. % of the process variable






29. 6 times its normal full load current






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






31. Salient and cylindrical






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






33. Wander erratically






34. 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






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






36. Self starting






37. RTD's in slots of stator windings






38. Current before voltage - capacitance load






39. 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






40. Power factor






41. Actions of first responders 1. sound alarm 2. risk assessment 3. attempt to extinguish






42. Outline the rights and responsibilites of workers and employers






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






44. 450kPa and 32 l/s






45. The chemical union of the combustible elements of a fuel and the oxygen in the air - at a rate that produces useful heat energy






46. 1. carbon 2. hydrogen 3. sulphur






47. 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






48. Organically bound component of the fuel






49. Is a strategy whereby one process is controlled in a specific ration to another process variable






50. Thermal coutout and a fuse link - cutout at 500% of normal current - greatest protection for motor currents