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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. An electrode where free electrons are produced






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






3. Atoms that have acquired an electrical charge






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


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






6. 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






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






10. Neutral charged particles of an atom






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






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






13. An energy storage device that converts chemical energy to electricity when power is needed.






14. 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.






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






16. The product of voltage times current






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






18. Positively charged particles of an atom






19. 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






20. 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






21. Any path that electrons flow through






22. 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 ****






23. 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






24. 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.






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






26. 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.






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






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






29. Voltage Source - Conductor - Switch - Load






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






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






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






33. 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 -






34. Negatively charged particles of an atom






35. 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.






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






37. 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






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


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






40. 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.






41. 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.






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






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






44. 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.






45. The flow of electrons






46. A material in which charge moves through easily






47. An electrode where reduction occurs






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






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






50. A circuit with a break in its path