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






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






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






4. Atoms that have acquired an electrical charge






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






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






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






8. One or more cells connected in series






9. Voltage Source - Conductor - Switch - Load






10. 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.






11. 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






12. 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






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 device that changes mechanical energy into electricity






15. 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.






16. 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






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






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






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






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






21. Negatively charged particles of an atom






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






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






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 that dissolves in water producing a solution that conducts electricity






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






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






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






29. 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






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






31. A circuit with a break in its path






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






33. 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 ****






34. The product of voltage times current






35. 125 and 250 VDC.






36. A material in which charge moves through easily






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






38. An electrode where free electrons are produced






39. 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.






40. The flow of electrons






41. Neutral charged particles of an atom






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






43. 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.






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






45. 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






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






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

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






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






50. 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.