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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. The product of voltage times current






3. 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 -






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






5. 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 ****






6. 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.






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






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






9. 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.






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






11. An electrode where reduction occurs






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






13. One or more cells connected in series






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






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






17. 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.






18. 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.






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






20. Temperature Controlled






21. 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






22. Neutral charged particles of an atom






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


24. A circuit with a break in its path






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






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






27. 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.






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






29. An electrode where free electrons are produced






30. A material in which charge moves through easily






31. 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






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






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


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






35. 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






36. 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






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






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






39. Atoms that have acquired an electrical charge






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






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






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






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






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






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






46. 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.






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






48. A device that changes mechanical energy into electricity






49. V=IR.


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.