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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 is usually insulated but becomes conductive through the addition of an impurity






2. 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






3. Negatively charged particles of an atom






4. An electrode where reduction occurs






5. An electrode where free electrons are produced






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






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






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






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






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






11. 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.






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






13. 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.






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






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






16. A device that changes mechanical energy into electricity






17. 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






18. 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






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






20. 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.






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






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






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






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






25. Analogous to a power plant switchyard but on the load end. Voltage is stepped down to Distribution System voltages.






26. 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.






27. A circuit with a break in its path






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






29. 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.






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






31. 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






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


33. 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






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






35. Atoms that have acquired an electrical charge






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. One or more cells connected in series






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






39. 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.






40. Voltage Source - Conductor - Switch - Load






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






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


43. 125 and 250 VDC.






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






45. The flow of electrons






46. 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.






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






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






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