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






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






3. The flow of electrons






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






5. A device that changes mechanical energy into electricity






6. 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






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






8. 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






9. Atoms that have acquired an electrical charge






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






11. 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






12. 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






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






14. 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






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






16. 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 -






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






18. 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 ****






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






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






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






22. 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.






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






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






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






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






28. V=IR.

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29. An electrode where reduction occurs






30. 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.






31. 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






32. One or more cells connected in series






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






34. Voltage Source - Conductor - Switch - Load






35. 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.






36. 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.






37. Any path that electrons flow through






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






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






40. 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






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






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

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






44. A material in which charge moves through easily






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






46. Negatively charged particles of an atom






47. An electrode where free electrons are produced






48. 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.






49. Operate somewhat like check valves such that current only flows in one direction - when the voltage on the input is higher than the output






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