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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. 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






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






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






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






5. The flow of electrons






6. 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






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






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






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






10. 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






11. Voltage Source - Conductor - Switch - Load






12. Positively charged particles of an atom






13. 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






14. Atoms that have acquired an electrical charge






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






16. One or more cells connected in series






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






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






19. 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.






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






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






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






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






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






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






26. 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






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






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

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






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






31. A circuit with a break in its path






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






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






34. 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 ****






35. An electrode where reduction occurs






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






37. 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.






38. Any path that electrons flow through






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






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






41. Temperature Controlled






42. 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






43. V=IR.

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






45. 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






46. 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.






47. 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






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






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






50. 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.







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