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






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






3. 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.






4. 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






5. 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.






6. 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.






7. The flow of electrons






8. Negatively charged particles of an atom






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






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






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






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






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






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






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






16. 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






17. Atoms that have acquired an electrical charge






18. 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






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






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






21. 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.






22. 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






23. Temperature Controlled






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






25. 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






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






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. A fundamental quantity in electricity (+ or -)






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






30. Positively charged particles of an atom






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






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






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






34. 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.






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 instantaneous movement from negatively charged atoms to positively charged atoms






37. One or more cells connected in series






38. V=IR.


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






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






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






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






44. 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.






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






46. 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.






47. 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






48. A circuit with a break in its path






49. Any path that electrons flow through






50. Voltage Source - Conductor - Switch - Load