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






2. A circuit with a break in its path






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






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






5. 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.






6. 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.






7. 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






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






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






11. An electrode where free electrons are produced






12. 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






13. 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.






14. An electrode where reduction occurs






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






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

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






18. Any path that electrons flow through






19. 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.






20. One or more cells connected in series






21. 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 ****






22. The flow of electrons






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






25. Positively charged particles of an atom






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






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






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






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






30. Neutral charged particles of an atom






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






32. 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






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






34. Temperature Controlled






35. A material in which charge moves through easily






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






37. 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






38. 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.






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






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






41. 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.






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






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






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






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






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






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






48. A device that changes mechanical energy into electricity






49. 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






50. The product of voltage times current