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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. An electrode where free electrons are produced






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






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






4. V=IR.


5. 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






6. 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.






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






8. One or more cells connected in series






9. An assembly of circuit breakers typically used to supply power to large motors and medium or low voltage transformers within the auxiliary power system. Each breaker is contained in a separate cubicle along with associated current transformers - and






10. 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 ****






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






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






13. Voltage Source - Conductor - Switch - Load






14. 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






15. Any path that electrons flow through






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






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






18. A material in which charge moves through easily






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. 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






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






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






23. The product of voltage times current






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






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






26. Temperature Controlled






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






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






29. A circuit with a break in its path






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






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






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






34. 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.






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






36. 125 and 250 VDC.






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






38. 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






39. 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.






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






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






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






44. Atoms that have acquired an electrical charge






45. Positively charged particles of an atom






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






47. The flow of electrons






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






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






50. 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.