Test your basic knowledge |

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. 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






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






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






4. 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






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






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






7. 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






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






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






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






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






12. 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






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






14. 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.






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






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






17. One or more cells connected in series






18. 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.






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






20. 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.






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






22. Any path that electrons flow through






23. Negatively charged particles of an atom






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






25. Neutral charged particles of an atom






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






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






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






29. 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






30. 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 ****






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






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






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






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






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

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






39. 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.






40. The product of voltage times current






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






42. 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.






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






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






45. Positively charged particles of an atom






46. 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.






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






48. Atoms that have acquired an electrical charge






49. A material in which charge moves through easily






50. An electrode where reduction occurs