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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. The flow of electrons






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






4. High voltage breakers and buses are arranged to allow power flow on the grid while isolating individual generators - transformers or transmission lines as needed. Power from the plant is delivered to the grid via the plant ****** - and the ******* se






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






6. 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.






7. 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






8. 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






9. A material in which charge moves through easily






10. 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






11. Neutral charged particles of an atom






12. Atoms that have acquired an electrical charge






13. Any path that electrons flow through






14. 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.






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






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






17. 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






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






19. Requires - in part - that (1) electric power from the transmission network to the onsite distribution system shall be supplied by two physically independent circuits (not necessarily on separate rights of way) designed and located so as to minimize t






20. Offsite power comes in via sartup transformer and some sites can backfeed power from grid via the main transformer OR even a crosstie






21. Changes the voltage of electricity so that it can be transferred over long distances






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






23. Building blocks of elements consisting of a positively charged nucleus surrounded by electrons






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. The flow of electrons (-) through a material






26. Positively charged particles of an atom






27. 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.






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






29. Represents the power transferred to or from capacitive and inductive elements in an AC circuit and is measured in volt-amperes reactive. Voltage and current are 90






30. Negatively charged particles of an atom






31. Used to supply power to large industrial and commercial facilities as well as the Retail System. lines can be compared to state highways and major roads around cities.






32. V=IR.

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33. A device that changes mechanical energy into electricity






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






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






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






37. 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.






38. A circuit with a break in its path






39. Is measured in watts and represents the power consumed by the resistive elements in an AC circuit






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






41. Is a configuration used for very high current bus assemblies typically operating at generator voltage levels of 20 to 24 kV where each conductor is mounted within its own enclosure.






42. Analogous to a power plant switchyard but on the load end. Voltage is stepped down to Distribution System voltages.






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






44. 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 ****






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






46. A material that is usually insulated but becomes conductive through the addition of an impurity






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






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






49. Temperature Controlled






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