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


2. The product of voltage times current






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






4. Positively charged particles of an atom






5. 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.






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






7. Any path that electrons flow through






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






9. 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






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






11. A device that changes mechanical energy into electricity






12. 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 -






13. 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.






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






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






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






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






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






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






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


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






22. V=IR.


23. An electrode where reduction occurs






24. 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 ****






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






26. 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






27. Temperature Controlled






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






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






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






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






32. 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






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






34. Negatively charged particles of an atom






35. An electrode where free electrons are produced






36. Atoms that have acquired an electrical charge






37. Voltage Source - Conductor - Switch - Load






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






39. Neutral charged particles of an atom






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






41. 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






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






43. 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.






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






45. 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






46. 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.






47. 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






48. 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.






49. A material in which charge moves through easily






50. 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