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 material through which a charge does not move easily






2. 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.






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






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






5. The product of voltage times current






6. Positively charged particles of an atom






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






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






9. Negatively charged particles of an atom






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






12. 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 ****






13. A device that changes mechanical energy into electricity






14. V=IR.


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






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






17. 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






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






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






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






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






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






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






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


25. Any path that electrons flow through






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






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






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






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


30. 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






31. Atoms that have acquired an electrical charge






32. 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






33. 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






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






35. 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.






36. 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.






37. Neutral charged particles of an atom






38. 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






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






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






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






42. An electrode where reduction occurs






43. One or more cells connected in series






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






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






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






47. Voltage Source - Conductor - Switch - Load






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






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






50. 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.