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. Range of 250mm water to 350kPa






2. 'hops'






3. 3 rotor windings spaced 120 degrees apart






4. 0.5 cubic meters (18 cubic feet)






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






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






7. Pancake or concentric






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






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






10. Shunt parallel with the armature






11. Expensive - externally mounted - not accurate for densisty changes






12. Pipe thickness must be increased by 15% or 3.0mm






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






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






15. Used up to 600V circuits - fuses are 250V and 600V made of zinc or alloy in a fiber tube. Amp sizes are 30 -60 -100 -200 -400 and 600A






16. Power factor






17. % moisture - fixed carbon






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






19. Promote safety and uniformity in the design - construction - installation - operation - testing - and repair of boilers - pressure vessels - and related equipment






20. Special squirrel cage winding in a synchronous machine - damper winding fitted into slots in the rotor pole faces






21. 1. product identifier 2. information for safe handling 3. hazardous symbol - first aid - safe handling 4. reference to MSDS






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






23. Used in bellows






24. Conencted to transformers or inside switchgears






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






26. Control of supply side disturbances by feedback - single loop






27. Is the combined effect of inductive reactance and capacitive reactance






28. 1.product information 2. hazardous ingredients 3. physical data 4. fire and explosion data 5. reactivity data 6. toxicological data 7. preventive measures 8. first aid 9. preperation information






29. Pulse generator operates at 3-40kHz






30. RTU (remote terminal unit) and MTU (master terminal unit) - modems or data communication equipement (DCE)






31. Current after voltage - inductive load






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






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






34. 1. carbon 2. hydrogen 3. sulphur






35. Negatively charge particles using high voltage DC charged particles - 95% + efficiency






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






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






38. 5 min delay






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






40. Takes into consideration the speed at which the variable is deviating from the SP - only occurs when there is a change in error rate






41. Current through all resistors






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






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






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






45. The percent of the process variable range that causes 100% change in the controller output






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






47. Intensity of heat radiation increases proportionately to the 4th power of absolute temperature of a body






48. Ananolg input - everchanging signal






49. Hard - dense - very brittle and shiny black with no layering - low % of volatile matter. Consists mostly of methane. Is expensive - high ignition temperature and burns slowly - and a lower heating value than high grade bituminous






50. Voltage decreases with an increase of load current