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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. Atoms that have acquired an electrical charge






2. 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






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






4. A circuit with a break in its path






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






6. 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.






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






8. 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.






9. The product of voltage times current






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






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






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






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






14. 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






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






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






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






18. Voltage Source - Conductor - Switch - Load






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






20. 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






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






22. Negatively charged particles of an atom






23. 125 and 250 VDC.






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






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






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






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






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






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






30. 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.






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






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






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






34. 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.






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






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






37. A material in which charge moves through easily






38. 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






39. Neutral charged particles of an atom






40. 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






41. 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.






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






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






44. 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.






45. 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






46. Any path that electrons flow through






47. 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.






48. An electrode where free electrons are produced






49. 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.






50. 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