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






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






4. 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.






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






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






7. A material in which charge moves through easily






8. 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






9. A device that changes mechanical energy into electricity






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






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






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






13. 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.






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






15. 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 ****






16. Neutral charged particles of an atom






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






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






19. 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






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






21. The flow of electrons






22. One or more cells connected in series






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






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






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






26. 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






27. The product of voltage times current






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






29. 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 -






30. Any path that electrons flow through






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






32. Temperature Controlled






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






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






35. 125 and 250 VDC.






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


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






38. 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.






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






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






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






42. 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






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






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






45. Positively charged particles of an atom






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






47. 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.






48. The source voltage is equal to the sum of the voltage drops across the elements of the circuit and the load.


49. 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






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