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






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






4. The product of voltage times current






5. A device that changes mechanical energy into electricity






6. 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.






7. 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.






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






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






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






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






12. Voltage Source - Conductor - Switch - Load






13. 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.






14. 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.






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






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






17. A circuit with a break in its path






18. 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






19. 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 ****






20. V=IR.


21. 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.






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






23. An electrode where free electrons are produced






24. Positively charged particles of an atom






25. Any path that electrons flow through






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






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






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






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






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






31. 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






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






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






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






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






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






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






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






39. The flow of electrons






40. 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






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






42. 125 and 250 VDC.






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. 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






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






46. 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.






47. 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






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






49. 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.






50. Atoms that have acquired an electrical charge