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


2. Positively charged particles of an atom






3. Neutral charged particles of an atom






4. 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






5. 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.






6. 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 -






7. 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.






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






9. The product of voltage times current






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






11. Any path that electrons flow through






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






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






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






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






16. 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






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






18. The flow of electrons






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






20. Atoms that have acquired an electrical charge






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






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






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






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






25. 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






26. 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.






27. 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.






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






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






30. Negatively charged particles of an atom






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






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






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






34. An electrode where reduction occurs






35. Temperature Controlled






36. 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






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






38. V=IR.


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






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






41. 125 and 250 VDC.






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






43. 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 ****






44. 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






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


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






47. 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.






48. 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.






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






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