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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 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.






2. 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 ****






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






4. Negatively charged particles of an atom






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






6. 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






7. 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






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






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

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10. 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






11. Positively charged particles of an atom






12. 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.






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






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






15. 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.






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






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






18. 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.






19. Neutral charged particles of an atom






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






21. 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






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






23. Atoms that have acquired an electrical charge






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






25. A device that changes mechanical energy into electricity






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. A circuit with a break in its path






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






29. 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.






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






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






32. Voltage Source - Conductor - Switch - Load






33. 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






34. An electrode where reduction occurs






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






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






37. 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 -






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






39. The flow of electrons






40. 125 and 250 VDC.






41. 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.






42. 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






43. Temperature Controlled






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






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






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

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47. 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.






48. 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






49. A material in which charge moves through easily






50. Any path that electrons flow through