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. The flow of electrons






2. A circuit with a break in its path






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






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






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






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






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






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






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






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. 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






12. 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.






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






14. 125 and 250 VDC.






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






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






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






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






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






20. 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.






21. 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






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






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


24. Temperature Controlled






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






26. Negatively charged particles of an atom






27. An electrode where free electrons are produced






28. Neutral charged particles of an atom






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






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






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. One or more cells connected in series






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






34. 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






35. 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






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






37. 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 ****






38. 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.






39. 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 -






40. 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.






41. 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






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






43. 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






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






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






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






47. 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.






48. Voltage Source - Conductor - Switch - Load






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






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