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






2. Negatively charged particles of an atom






3. 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.






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






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






6. Used to supply power to large industrial and commercial facilities as well as the Retail System. lines can be compared to state highways and major roads around cities.






7. Any path that electrons flow through






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






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






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






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






13. 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






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






15. Atoms that have acquired an electrical charge






16. Positively charged particles of an atom






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






18. 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.






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






20. An electrode where free electrons are produced






21. 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






22. 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






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






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






25. 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






26. 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






27. A device that changes mechanical energy into electricity






28. The flow of electrons






29. 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 -






30. 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.






31. The product of voltage times current






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






33. 125 and 250 VDC.






34. Voltage Source - Conductor - Switch - Load






35. V=IR.

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






37. 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 ****






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






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






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






41. A circuit with a break in its path






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






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






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






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






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






47. Neutral charged particles of an atom






48. 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






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






50. 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.