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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 device that changes mechanical energy into electricity






2. 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 ****






3. An electrode where reduction occurs






4. 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






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






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






7. 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.






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






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






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


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






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


13. V=IR.


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






15. An electrode where free electrons are produced






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






17. One or more cells connected in series






18. 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.






19. 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.






20. 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.






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






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






23. Voltage Source - Conductor - Switch - Load






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






25. The product of voltage times current






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






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






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






29. Negatively charged particles of an atom






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






31. Positively charged particles of an atom






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






33. Temperature Controlled






34. 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.






35. 125 and 250 VDC.






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






37. 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






38. 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.






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






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






41. A material in which charge moves through easily






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






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






44. Atoms that have acquired an electrical charge






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






46. 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






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






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






49. 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






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