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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. 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






2. 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






3. The flow of electrons






4. Any path that electrons flow through






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






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


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






8. 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.






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






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






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






12. 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.






13. 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.






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






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






16. 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






17. 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.






18. 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.






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






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






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






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






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






24. 125 and 250 VDC.






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






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






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






28. An electrode where free electrons are produced






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






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






31. Neutral charged particles of an atom






32. An electrode where reduction occurs






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






34. 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






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






36. 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






37. A device that changes mechanical energy into electricity






38. 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.






39. Temperature Controlled






40. Positively charged particles of an atom






41. One or more cells connected in series






42. V=IR.


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






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






45. Atoms that have acquired an electrical charge






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






47. 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






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


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






50. 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






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