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






2. 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






3. 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






4. Atoms that have acquired an electrical charge






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






6. An electrode where free electrons are produced






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






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






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


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






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






12. 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 ****






13. 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






14. V=IR.


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






16. Neutral charged particles of an atom






17. 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






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. The flow of electrons






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






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






22. 125 and 250 VDC.






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






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






25. Positively charged particles of an atom






26. One or more cells connected in series






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


28. 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






29. 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






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






31. 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.






32. The product of voltage times current






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






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






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






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






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






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






39. 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






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






41. 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.






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






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






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






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






47. An electrode where reduction occurs






48. 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.






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






50. A device that changes mechanical energy into electricity