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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. 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






2. 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.






3. 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






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






5. 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.






6. 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.






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






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






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






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






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






12. The product of voltage times current






13. Neutral charged particles of an atom






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






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






16. Voltage Source - Conductor - Switch - Load






17. 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 -






18. 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






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






21. An electrode where free electrons are produced






22. 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.






23. 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






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

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25. 125 and 250 VDC.






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






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






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






29. 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.






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






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






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






33. A material in which charge moves through easily






34. The flow of electrons






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






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






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






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. An electrode where reduction occurs






40. 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






41. 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






42. A device that changes mechanical energy into electricity






43. V=IR.

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






45. 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






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






47. Negatively charged particles of an atom






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






49. 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.






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