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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. 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.






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






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






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






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






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






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






9. 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.






10. Temperature Controlled






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. A fundamental quantity in electricity (+ or -)






13. 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.






14. 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






15. Voltage Source - Conductor - Switch - Load






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






17. A circuit with a break in its path






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






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






20. Positively charged particles of an atom






21. A material in which charge moves through easily






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






23. 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






24. 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.






25. One or more cells connected in series






26. 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.






27. 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 -






28. 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.






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






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






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






32. The flow of electrons






33. Any path that electrons flow through






34. 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






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






36. The product of voltage times current






37. 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 ****






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






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


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






41. Atoms that have acquired an electrical charge






42. 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.






43. 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






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






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






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


47. Power Systems Branch [Position] one required nuclear utilities to install degraded grid voltage relay schemes to preclude connecting safety related loads to the grid following an accident if grid voltage should be inadequate to support required opera






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






50. 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.