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






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






4. 125 and 250 VDC.






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






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






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






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






9. V=IR.

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






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






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






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






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






15. 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






16. Atoms that have acquired an electrical charge






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






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






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






20. 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.






21. Voltage Source - Conductor - Switch - Load






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






23. 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






24. A material in which charge moves through easily






25. Temperature Controlled






26. 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.






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






28. 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






29. 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.






30. 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.






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






32. 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 -






33. Any path that electrons flow through






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






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






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






37. 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.






38. The product of voltage times current






39. Positively charged particles of an atom






40. 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






41. A device that changes mechanical energy into electricity






42. A circuit with a break in its path






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






44. 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






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






46. 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






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






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






49. 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.






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







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