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






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






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






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






5. Negatively charged particles of an atom






6. 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






7. 125 and 250 VDC.






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






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. 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






11. 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.






12. Positively charged particles of an atom






13. 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.






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






15. A material in which charge moves through easily






16. 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.






17. Neutral charged particles of an atom






18. 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






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






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






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






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






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






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






26. 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






27. Voltage Source - Conductor - Switch - Load






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. One or more cells connected in series






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






31. 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.






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

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






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






35. 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.






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






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






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






39. 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.






40. V=IR.

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41. The product of voltage times current






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






43. 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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44. Used in numerous applications to amplify or perform switching operations.






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






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






47. The flow of electrons






48. A device that changes mechanical energy into electricity






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






50. 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.