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






2. One or more cells connected in series






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






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






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






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






7. Neutral charged particles of an atom






8. 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






9. A circuit with a break in its path






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






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






12. The flow of electrons






13. 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






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






15. 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.






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






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






19. The product of voltage times current






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. Any path that electrons flow through






22. 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.






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






24. Positively charged particles of an atom






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






26. V=IR.

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27. 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






28. Negatively charged particles of an atom






29. 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.






30. 125 and 250 VDC.






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






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






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






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






35. 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.






36. An electrode where reduction occurs






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






38. 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 ****






39. Atoms that have acquired an electrical charge






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






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. A material in which charge moves through easily






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






44. An electrode where free electrons are produced






45. 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.






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






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






48. 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






49. 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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50. 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