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






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






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






4. 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.






5. 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.






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






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






8. Temperature Controlled






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






10. 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






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






12. A material in which charge moves through easily






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






14. Requires - in part - that (1) electric power from the transmission network to the onsite distribution system shall be supplied by two physically independent circuits (not necessarily on separate rights of way) designed and located so as to minimize t






15. A device that changes mechanical energy into electricity






16. 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






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






18. 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.






19. 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 ****






20. 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






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






22. Neutral charged particles of an atom






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






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






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






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






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






30. 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 -






31. 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






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






33. 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.






34. The product of voltage times current






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






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






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






38. Negatively charged particles of an atom






39. Atoms that have acquired an electrical charge






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






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






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






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






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






45. 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






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






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






48. 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






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






50. 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.







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