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






2. A material in which charge moves through easily






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






4. The product of voltage times current






5. 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.






6. 125 and 250 VDC.






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






8. An electrode where reduction occurs






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






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






11. Atoms that have acquired an electrical charge






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






13. 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 ****






14. 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 -






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






16. 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






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






18. 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.






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






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


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






22. 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.






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


24. Requires - in part - that (1) electric power from the transmission network to the onsite distribution system shall be supplied by two physically independent circuits (not necessarily on separate rights of way) designed and located so as to minimize t






25. 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






26. 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






27. 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






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






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






30. 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.






31. Neutral charged particles of an atom






32. Any path that electrons flow through






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






34. 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.






35. Positively charged particles of an atom






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. Voltage Source - Conductor - Switch - Load






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






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






40. 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.






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. 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.






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






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






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






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






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






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






49. The flow of electrons






50. A circuit with a break in its path






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