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






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






3. Temperature Controlled






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






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






6. 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 ****






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






8. 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.






9. A device that changes mechanical energy into electricity






10. 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.






11. 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






12. Atoms that have acquired an electrical charge






13. 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.






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






15. Any path that electrons flow through






16. Positively charged particles of an atom






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






18. V=IR.

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






20. A circuit with a break in its path






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






22. 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






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






24. The flow of electrons






25. 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.






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






28. 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






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. The flow of electrons (-) through a material






31. 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.






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






33. A material in which charge moves through easily






34. One or more cells connected in series






35. Voltage Source - Conductor - Switch - Load






36. 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






37. An electrode where reduction occurs






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






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






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






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






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






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






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






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






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






48. The product of voltage times current






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






50. 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.