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






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






3. 125 and 250 VDC.






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. Atoms that have acquired an electrical charge






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






7. A circuit with a break in its path






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






9. 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






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






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






12. 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.






13. 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.






14. 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






15. Neutral charged particles of an atom






16. Positively charged particles of an atom






17. 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.






18. Voltage Source - Conductor - Switch - Load






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






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






21. 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.






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






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






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






25. 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.






26. 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 -






27. Total Current entering a junction must equal current leaving a junction

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






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






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






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






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






33. V=IR.

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34. A device that changes mechanical energy into electricity






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






36. 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 ****






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






38. Any path that electrons flow through






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






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






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






42. One or more cells connected in series






43. 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






44. 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.






45. Is typically used for medium voltage applications where the 3 phase conductors can be mounted within the same enclosure.






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






47. An assembly of circuit breakers typically used to supply power to large motors and medium or low voltage transformers within the auxiliary power system. Each breaker is contained in a separate cubicle along with associated current transformers - and






48. Are used to supply power to smaller industrial and commercial users as well as residential customers. These lines can be compared to local roads such as the one in your local area or neighborhood - i.e. they're designed to handle the needs of local t






49. 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






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