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Electrical Engineering

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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. Negatively charged particles of an atom






2. 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






3. 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






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






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






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






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






8. Atoms that have acquired an electrical charge






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






10. Voltage Source - Conductor - Switch - Load






11. Temperature Controlled






12. 125 and 250 VDC.






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






14. 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






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






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






17. The product of voltage times current






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






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. 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






21. 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.






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






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






24. 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






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






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






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






29. An electrode where free electrons are produced






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






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






32. 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






33. 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






34. 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.






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






36. The flow of electrons






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






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






39. 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.






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

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






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






43. 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.






44. V=IR.

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






46. 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 -






47. Any path that electrons flow through






48. A circuit with a break in its path






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






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







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