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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. 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.






2. Atoms that have acquired an electrical charge






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






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






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






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






7. An electrode where reduction occurs






8. 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.






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






10. Voltage Source - Conductor - Switch - Load






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






12. 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.






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






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






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






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






17. 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






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






21. 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






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






23. Requires - in part - that (1) electric power from the transmission network to the onsite distribution system shall be supplied by two physically independent circuits (not necessarily on separate rights of way) designed and located so as to minimize t






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






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






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






27. One or more cells connected in series






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






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






30. Are used to provide low voltage circuits for use in metering - monitoring - and protective relaying applications. The turns ratio of the transformer determines the low voltage rating as a function of the system voltage - and is often selected to be 1






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






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






33. 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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34. A material in which charge moves through easily






35. 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.






36. 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






37. 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






38. 125 and 250 VDC.






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






40. Any path that electrons flow through






41. V=IR.

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42. The product of voltage times current






43. 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






44. 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 ****






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






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






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






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






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






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