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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. 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.






2. 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.






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






4. 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.






5. 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






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






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






8. The source voltage is equal to the sum of the voltage drops across the elements of the circuit and the load.


9. Any path that electrons flow through






10. A device that changes mechanical energy into electricity






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






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






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






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






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






16. Neutral charged particles of an atom






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






18. 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






19. 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






20. Temperature Controlled






21. Power Systems Branch [Position] one required nuclear utilities to install degraded grid voltage relay schemes to preclude connecting safety related loads to the grid following an accident if grid voltage should be inadequate to support required opera






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






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


24. 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






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






26. 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.






27. An electrode where reduction occurs






28. 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.






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






30. 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 -






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






32. The product of voltage times current






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






34. 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.






35. 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






36. V=IR.


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






38. 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






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






40. 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.






41. 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






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






43. Negatively charged particles of an atom






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






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






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






47. Atoms that have acquired an electrical charge






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






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






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