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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. The flow of electrons






2. 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.






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






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






5. 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.






6. 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






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






8. 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






9. 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.






10. V=IR.


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






12. Positively charged particles of an atom






13. 125 and 250 VDC.






14. Neutral charged particles of an atom






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






16. 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






17. Temperature Controlled






18. 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






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






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






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






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






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






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






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






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






27. Any path that electrons flow through






28. One or more cells connected in series






29. 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.






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






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






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






33. Voltage Source - Conductor - Switch - Load






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






35. 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






36. 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






37. An electrode where free electrons are produced






38. 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.






39. 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






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. Atoms that have acquired an electrical charge






42. 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.






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






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






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






46. 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






47. 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.






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






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






50. An electrode where reduction occurs