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






2. The product of voltage times current






3. The flow of electrons






4. 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.






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






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






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. A circuit with a break in its path






9. 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.






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






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






12. 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






13. 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.






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






15. Any path that electrons flow through






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






17. 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.






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






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. Voltage Source - Conductor - Switch - Load






21. 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.






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






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






24. 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






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






26. 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.






27. 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






28. 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






29. A material in which charge moves through easily






30. An electrode where free electrons are produced






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

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






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. V=IR.

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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. An electrode where reduction occurs






37. Positively charged particles of an atom






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






39. Atoms that have acquired an electrical charge






40. 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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41. Large battery - a battery charger - and a distribution panel






42. 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






43. 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.






44. 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






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






46. A device that changes mechanical energy into electricity






47. 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.






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






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






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