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






2. 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






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






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






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






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






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






8. An electrode where reduction occurs






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






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






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. The flow of electrons






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






15. 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 -






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






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






18. 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.






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






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






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






22. Atoms that have acquired an electrical charge






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






24. 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.






25. Voltage Source - Conductor - Switch - Load






26. An electrode where free electrons are produced






27. A material in which charge moves through easily






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






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






30. 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






31. 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.






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






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






35. 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






36. One or more cells connected in series






37. 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.






38. 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






39. Temperature Controlled






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. The product of voltage times current






42. 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






43. V=IR.

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






45. 125 and 250 VDC.






46. Neutral charged particles of an atom






47. 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






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






49. 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.






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