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






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






3. Positively charged particles of an atom






4. V=IR.

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






6. 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.






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






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






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






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






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






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






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






15. An electrode where free electrons are produced






16. protect your eyes and clothing. air must be circulated through the battery rooms with large stationary batteries to prevent a build-up of a combustible mixture.System cannot be grounded. First ground should do nothing.






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






18. 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.






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






20. 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.






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






22. 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.






23. A material in which charge moves through easily






24. 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






25. 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.






26. 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






27. A circuit with a break in its path






28. 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.






29. Any path that electrons flow through






30. 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






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






32. 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






33. 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 ****






34. 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






35. One or more cells connected in series






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






37. 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






38. 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






39. The flow of electrons






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






41. 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.






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






43. A device that changes mechanical energy into electricity






44. Neutral charged particles of an atom






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






46. 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






47. The product of voltage times current






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

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49. Negatively charged particles of an atom






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