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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. 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






2. 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.






3. 125 and 250 VDC.






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






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






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






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






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






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






10. One or more cells connected in series






11. 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






12. 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






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






15. Voltage Source - Conductor - Switch - Load






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






17. If you are requesting service for new loads - or are making changes that affect the time when a load would operate or the amount of load -






18. Temperature Controlled






19. An electrode where reduction occurs






20. 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.






21. An electrode where free electrons are produced






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






23. 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






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






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. A fundamental quantity in electricity (+ or -)






27. 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.






28. Any path that electrons flow through






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






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






31. The product of voltage times current






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






33. Neutral charged particles of an atom






34. 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






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






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






37. 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.






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. Positively charged particles of an atom






40. The flow of electrons






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






42. 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.






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






44. A circuit with a break in its path






45. 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 ****






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






47. A device that changes mechanical energy into electricity






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






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






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