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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 has no resistance to electrical current - this usually occurs near absolute zero






2. 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.






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






4. 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






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






6. One or more cells connected in series






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






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






9. 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






10. 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.






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


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






13. An electrode where free electrons are produced






14. An electrode where reduction occurs






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






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






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






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






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






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






21. 125 and 250 VDC.






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






23. 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.






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






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






26. 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






27. 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.






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






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






30. Negatively charged particles of an atom






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






32. 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 ****






33. 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






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






35. A material in which charge moves through easily






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






37. 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.






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






39. Any path that electrons flow through






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






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






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






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






44. 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.






45. V=IR.


46. The flow of electrons






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






48. The product of voltage times current






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






50. Positively charged particles of an atom






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