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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 solid conductor through which a current enters or exits a medium






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






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






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






5. Positively charged particles of an atom






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






7. 125 and 250 VDC.






8. An electrode where free electrons are produced






9. 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.






10. V=IR.


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






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






13. 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.






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






15. 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






16. 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.






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






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






19. A circuit with a break in its path






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






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






22. 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.






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






24. 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 -






25. A material in which charge moves through easily






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






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






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






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






30. 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.






31. 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






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






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






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






35. 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.






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






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






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






39. 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.






40. 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






41. Voltage Source - Conductor - Switch - Load






42. 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






43. One or more cells connected in series






44. 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






45. Temperature Controlled






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






47. 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 ****






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






49. 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.






50. A device that changes mechanical energy into electricity