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Electrical Engineering

Subject : engineering
Instructions:
  • Answer 50 questions in 30 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. 125 and 250 VDC.






2. A material in which charge moves through easily






3. 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.






4. The product of voltage times current






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






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






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






9. 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.






10. An electrode where free electrons are produced






11. A device that changes mechanical energy into electricity






12. An electrode where reduction occurs






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






14. 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.






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






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






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






18. Negatively charged particles of an atom






19. Atoms that have acquired an electrical charge






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






21. 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.






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






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






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






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






26. 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






27. A circuit with a break in its path






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






29. 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






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






31. Any path that electrons flow through






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






33. 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






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. The path of an electron in an atom or molecule






36. Neutral charged particles of an atom






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






38. Temperature Controlled






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


40. 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






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






42. 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.






43. 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.






44. Voltage Source - Conductor - Switch - Load






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






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






47. The flow of electrons






48. 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.






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






50. V=IR.


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