Test your basic knowledge |

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 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.






2. A circuit with a break in its path






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






4. 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






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






6. 125 and 250 VDC.






7. V=IR.


8. 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.






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






10. 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.






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






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






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






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






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






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






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






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






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






20. 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






21. 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.






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






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


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






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






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. 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






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






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






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






31. Temperature Controlled






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. Positively charged particles of an atom






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






35. Voltage Source - Conductor - Switch - Load






36. 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






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






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






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






40. 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.






41. Neutral charged particles of an atom






42. 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






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






44. 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






45. A material in which charge moves through easily






46. 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.






47. The flow of electrons






48. Any path that electrons flow through






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






50. An electrode where reduction occurs