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






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






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






4. 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






5. 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






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






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






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






9. 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.






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






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






12. The flow of electrons






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






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






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






16. 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 ****






17. An electrode where free electrons are produced






18. 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






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






20. 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.






21. An electrode where reduction occurs






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






23. 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.






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






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






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






27. 125 and 250 VDC.






28. V=IR.

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29. Voltage Source - Conductor - Switch - Load






30. Atoms that have acquired an electrical charge






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






32. A device that changes mechanical energy into electricity






33. 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 -






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






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






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. The product of voltage times current






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. Power Systems Branch [Position] one required nuclear utilities to install degraded grid voltage relay schemes to preclude connecting safety related loads to the grid following an accident if grid voltage should be inadequate to support required opera






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

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42. Temperature Controlled






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






44. Positively charged particles of an atom






45. One or more cells connected in series






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






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






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






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






50. 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.