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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. The product of voltage times current






2. The flow of electrons






3. An electrode where reduction occurs






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






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






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






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






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






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






10. 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






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






12. 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






13. V=IR.

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






15. 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






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






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






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






19. 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.






20. A material in which charge moves through easily






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






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






24. 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.






25. Atoms that have acquired an electrical charge






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






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






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






29. Any path that electrons flow through






30. 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.






31. 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






32. 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.






33. Voltage Source - Conductor - Switch - Load






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 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.






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






37. 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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38. One or more cells connected in series






39. Temperature Controlled






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






41. 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






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






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






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






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






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






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






48. An electrode where free electrons are produced






49. Negatively charged particles of an atom






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