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






3. 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.






4. 125 and 250 VDC.






5. Atoms that have acquired an electrical charge






6. 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






7. 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






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






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






10. A circuit with a break in its path






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






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






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






14. 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.






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






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






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






18. 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 ****






19. 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






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






21. 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.






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






23. Any path that electrons flow through






24. V=IR.

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25. Voltage Source - Conductor - Switch - Load






26. Positively charged particles of an atom






27. 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






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






29. A material in which charge moves through easily






30. 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






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






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






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






35. A device that changes mechanical energy into electricity






36. 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 -






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






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

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






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






41. The flow of electrons






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






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






44. The product of voltage times current






45. 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.






46. An electrode where reduction occurs






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






48. 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.






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






Can you answer 50 questions in 15 minutes?



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