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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. 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.






2. Negatively charged particles of an atom






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






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. Positively charged particles of an atom






6. 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.






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






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






9. 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






10. 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






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






12. Neutral charged particles of an atom






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






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






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






16. 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






17. 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.






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






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






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






21. An electrode where free electrons are produced






22. Atoms that have acquired an electrical charge






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






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






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






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






27. 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.






28. Temperature Controlled






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






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






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






32. 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.






33. 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






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


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






36. 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 ****






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






38. V=IR.


39. 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.






40. Voltage Source - Conductor - Switch - Load






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






42. A material in which charge moves through easily






43. Any path that electrons flow through






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






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






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






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






48. 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.






49. The product of voltage times current






50. One or more cells connected in series