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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. 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.






2. A circuit with a break in its path






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






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






6. A material in which charge moves through easily






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


8. 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






9. 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.






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






11. 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.






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






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






14. 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






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






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






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






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






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. 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






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






22. Positively charged particles of an atom






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






24. 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.






25. The flow of electrons






26. Atoms that have acquired an electrical charge






27. 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






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






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


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






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






32. 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






33. 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.






34. One or more cells connected in series






35. 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 -






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






37. Negatively charged particles of an atom






38. Voltage Source - Conductor - Switch - Load






39. A device that changes mechanical energy into electricity






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






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






42. An electrode where reduction occurs






43. Neutral charged particles of an atom






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






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






46. 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






47. Any path that electrons flow through






48. 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.






49. An electrode where free electrons are produced






50. 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.