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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. A material through which a charge does not move easily






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






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






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






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






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






8. An electrode where reduction occurs






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. The flow of electrons (-) through a material






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






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






13. Negatively charged particles of an atom






14. 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






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






16. A material in which charge moves through easily






17. 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.






18. 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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19. 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 -






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






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






23. 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.






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






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






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






27. The product of voltage times current






28. 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






29. Large battery - a battery charger - and a distribution panel






30. 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.






31. 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






32. 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.






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






34. Neutral charged particles of an atom






35. 125 and 250 VDC.






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






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






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

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






40. 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






41. 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.






42. 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






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






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






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






46. 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 ****






47. A circuit with a break in its path






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






49. A device that changes mechanical energy into electricity






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