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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 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.






2. Any path that electrons flow through






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






4. Positively charged particles of an atom






5. One or more cells connected in series






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






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






8. 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






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






10. An electrode where free electrons are produced






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






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






13. Voltage Source - Conductor - Switch - Load






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






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






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






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






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






21. 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.






22. 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






23. 125 and 250 VDC.






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






25. Temperature Controlled






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






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






28. 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.






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






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. V=IR.

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






33. 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.






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






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






36. An electrode where reduction occurs






37. 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 -






38. 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.






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






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






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

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






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






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






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






46. 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






47. 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






48. 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.






49. The flow of electrons






50. 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







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