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Electrical Engineering

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. Changes in voltage caused by motor starts or other loads being switched onto an electrical system






2. (analogous to flow) predominantly flows on the surface of the conductor.






3. Unit's main generator - offsite power via the switchyard - and redundant emergency diesel generators






4. A mechanical switching device used to either enable or interrupt current flow in a circuit. Typically provides both overload and fault protection. Is similar to a fuse; however - can be reset and reused.






5. A condition where one or more phases have come into contact with ground or other phase(s) of the circuit - or the insulation separating them has been degraded. The current flow is only limited by the impedance between the source(s) and the ****






6. Used in numerous applications to amplify or perform switching operations.






7. If you are requesting service for new loads - or are making changes that affect the time when a load would operate or the amount of load -






8. Are used to provide low current circuits for use in metering - monitoring - and protective relaying applications. The turns ratio determines the amount of current that will be available in the secondary as a function of the system current on the prim






9. A material in which charge moves through easily






10. Similar to switchgear except for use in low voltage versus medium voltage applications. used to supply power to motor control centers and large individual low voltage motors in some applications.






11. Used to convert mechanical energy to electrical energy coupled to the turbine shaft






12. A solid conductor through which a current enters or exits a medium






13. The product of voltage times current






14. A circuit with a complete path - which allows for charges to move






15. Voltage is stepped down again to serve smaller industrial and commercial customers as well as residential needs.






16. Nuclear fuel is used to produce heat which is used to create steam. The steam is used to spin the turbine. The turbine shaft is connected to the generator rotor. The mechanical energy is converted to electrical energy through the generator.






17. Used to optimize power output. Multiply by root 3.






18. A circuit with a break in its path






19. The power output from the plant is stepped up in voltage to match the grid voltage. Transformers that are used to provide offsite power to the plant (e.g. when the generator is off-line) step down the voltage.






20. Is the vector sum of real and reactive power in an AC circuit and is measured in volt-amperes.






21. One or more cells connected in series






22. Voltage Source - Conductor - Switch - Load






23. An electrode where free electrons are produced






24. The source voltage is equal to the sum of the voltage drops across the elements of the circuit and the load.

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25. V=IR.

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26. Used to isolate equipment but are typically not designed to be opened or closed while the circuit is energized (i.e. they're not designed to interrupt current). Also used in switchyard to isolate equipment






27. An energy storage device that converts chemical energy to electricity when power is needed.






28. The instantaneous movement from negatively charged atoms to positively charged atoms






29. Positively charged particles of an atom






30. Operate somewhat like check valves such that current only flows in one direction - when the voltage on the input is higher than the output






31. The flow of electrons






32. Used for transmission systems which are used for transporting bulk power from large generators to areas with heavy load concentrations such as cities.






33. Power Systems Branch [Position] one required nuclear utilities to install degraded grid voltage relay schemes to preclude connecting safety related loads to the grid following an accident if grid voltage should be inadequate to support required opera






34. Negatively charged particles of an atom






35. A device that changes mechanical energy into electricity






36. An assembly of low voltage circuit breakers and/or starters used to supply individual loads of small to moderate sizes. Each feeder circuit is typically contained in a separate compartment or bucket.






37. A voltage source that does not change polarity such as that delivered from a battery.






38. A fundamental quantity in electricity (+ or -)






39. Main Generator feeds main transformer - aux transformer (to aux loads) and crosstie to train B






40. Used at low voltage levels (600 volts and below) to feed individual loads. These devices typically contain a thermal magnetic element which provides an inverse time tripping characteristic.






41. May be used to power various low voltage loads and are typically used for applications that do not require any form of remote control.






42. Significant impact on the capability of equipment to perform properly since the torque delivered by a motor is proportional to the voltage squared






43. The path of an electron in an atom or molecule






44. A material that has no resistance to electrical current - this usually occurs near absolute zero






45. Neutral charged particles of an atom






46. A material through which a charge does not move easily






47. Are used to provide low voltage circuits for use in metering - monitoring - and protective relaying applications. The turns ratio of the transformer determines the low voltage rating as a function of the system voltage - and is often selected to be 1






48. The flow of electrons (-) through a material






49. Are used at low voltages rather than medium voltage and they contain CTs and protective devices as part of the assembly.






50. A material that dissolves in water producing a solution that conducts electricity