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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. 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.






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






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






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






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






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






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






8. 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 ****






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






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

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11. 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






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






13. 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






14. A circuit with a break in its path






15. A material in which charge moves through easily






16. 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.






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






18. Neutral charged particles of an atom






19. If you are requesting service for new loads - or are making changes that affect the time when a load would operate or the amount of load -






20. Positively charged particles of an atom






21. The product of voltage times current






22. V=IR.

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23. 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.






24. 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






25. Any path that electrons flow through






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






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






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






29. 125 and 250 VDC.






30. 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.






31. 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.






32. 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.






33. A device that changes mechanical energy into electricity






34. An electrode where free electrons are produced






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






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






37. 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






38. 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.






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






40. 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.






41. 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






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






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






44. An electrode where reduction occurs






45. Voltage Source - Conductor - Switch - Load






46. The flow of electrons






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






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






49. Temperature Controlled






50. 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