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






2. 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






3. V=IR.


4. 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.






5. 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






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






7. One or more cells connected in series






8. 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






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


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






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






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






13. 125 and 250 VDC.






14. Neutral charged particles of an atom






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






16. 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.






17. 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






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






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






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






21. 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.






22. 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.






23. 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 -






24. 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






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






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






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






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


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






31. A device that changes mechanical energy into electricity






32. 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.






33. 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






34. Positively charged particles of an atom






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






36. Voltage Source - Conductor - Switch - Load






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






38. A material in which charge moves through easily






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






40. The flow of electrons






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






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






43. A circuit with a break in its path






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






45. Negatively charged particles of an atom






46. 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 ****






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






48. An electrode where reduction occurs






49. Any path that electrons flow through






50. Is typically used for medium voltage applications where the 3 phase conductors can be mounted within the same enclosure.