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






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






3. 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






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






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






6. 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






7. 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






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






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






10. 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 -






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






12. 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 ****






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






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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


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






16. A device that changes mechanical energy into electricity






17. A circuit with a break in its path






18. 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






19. 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.






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






21. The product of voltage times current






22. Voltage Source - Conductor - Switch - Load






23. 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.






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






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. 125 and 250 VDC.






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






28. 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.






29. 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.






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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


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






32. 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






33. One or more cells connected in series






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






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






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






37. An electrode where free electrons are produced






38. 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.






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






40. 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.






41. The flow of electrons






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






43. A material in which charge moves through easily






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






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






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






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






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






49. 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.






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