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






2. 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






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






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






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






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






7. 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.






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






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






10. Negatively charged particles of an atom






11. Any path that electrons flow through






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






13. Voltage Source - Conductor - Switch - Load






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






15. V=IR.

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16. 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.






17. The product of voltage times current






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






19. Temperature Controlled






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. 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.






22. 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






23. The flow of electrons






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






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






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






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






28. An electrode where reduction occurs






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






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






31. One or more cells connected in series






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






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






34. A circuit with a break in its path






35. 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.






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






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






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

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39. 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






40. A material in which charge moves through easily






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






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






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






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






45. Atoms that have acquired an electrical charge






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






47. Positively charged particles of an atom






48. 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.






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






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

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