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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 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 ****






2. A circuit with a break in its path






3. 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.






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






5. 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






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






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






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






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






10. 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






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






12. Temperature Controlled






13. A material in which charge moves through easily






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






15. Atoms that have acquired an electrical charge






16. 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.






17. 125 and 250 VDC.






18. 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 -






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






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






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






22. Positively charged particles of an atom






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






24. 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.






25. 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.






26. 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






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






28. 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.






29. 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.






30. V=IR.

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






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






33. The flow of electrons






34. Negatively charged particles of an atom






35. 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






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






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






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






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






40. A device that changes mechanical energy into electricity






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






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






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






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






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






46. 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.






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. 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.






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






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







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