Test your basic knowledge |

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. 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






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. Negatively charged particles of an atom






4. Positively charged particles of an atom






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. The flow of electrons






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. 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






10. The path of an electron in an atom or molecule






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






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






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






15. Any path that electrons flow through






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






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






18. 125 and 250 VDC.






19. 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.






20. 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 -






21. 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.






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. 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.






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






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






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






27. An electrode where reduction occurs






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






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






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






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






32. An electrode where free electrons are produced






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






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






35. A material in which charge moves through easily






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






38. Neutral charged particles of an atom






39. 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.






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






41. 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






42. 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.






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






44. 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






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






46. Voltage Source - Conductor - Switch - Load






47. 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 ****






48. A device that changes mechanical energy into electricity






49. Atoms that have acquired an electrical charge






50. A circuit with a break in its path