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






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






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. V=IR.


5. 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






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






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






8. 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






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






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






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


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






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






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






15. An electrode where reduction occurs






16. The product of voltage times current






17. 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.






18. Negatively charged particles of an atom






19. 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






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






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






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






23. 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






24. 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






25. 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.






26. One or more cells connected in series






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






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






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






30. 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.






31. A material in which charge moves through easily






32. 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.






33. 125 and 250 VDC.






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






35. Temperature Controlled






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






37. A device that changes mechanical energy into electricity






38. Atoms that have acquired an electrical charge






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






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






41. Voltage Source - Conductor - Switch - Load






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






43. 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






44. 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 ****






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






46. Any path that electrons flow through






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






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






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






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