Test your basic knowledge |

Electrical Components

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 anode (+) or cathode (-) conductor on a device through which an electric current passes.






2. A reference point at zero potential with respect to the earth. In an electronic circuit it is the common return path for electric current. A conducting connection between the earth and an electrical circuit or electrical equipment. Also - the negativ






3. A device that transfers power or energy from one system to another - such as taking a physical quality and changing it to an electrical signal.






4. The range of voltage needed to maintain operation of a control or device.






5. An electrical circuit that increases the power - voltage or current of an applied signal.






6. One of the very small discrete packets into which many forms of energy are subdivided.






7. A fluctuation in the intensity of a steady current.






8. An electrically conductive fused salt or a solution where the charge is carried by ionic movement.






9. The time based relationship between a reference and a periodic function.






10. NFPA;






11. The measure of the ability of a material or substance to carry electrical current.






12. Magnetically - opposite poles - north and south. In electricity - oppositely charged poles - positive and negative.






13. IEEE;






14. A solid-state switching device used in switching AC wave forms.






15. The increase of the power level - current or voltage of a signal. In an amplifier it is the ratio of the output to the input signal levels.






16. Electric current passing through an electrolyte which produces chemical changes in it.






17. SI; The standard metric system of units.






18. A material used to conduct electricity or heat.






19. The basic of thermal energy. The work done by the force of one newton acting through a distance of one meter.






20. ISO;






21. One millionth of an amp.






22. A device used to store electrical energy in an electrostatic field until discharge.






23. A positive (+) electrode. The point where electrons exit from a device to the external electric circuit.






24. A variable resistor.






25. The behavior of charged particles and the steady motion of charge in magnetic and electric fields.






26. A device - instrument or component that will not produce any spark or thermal effects under any conditions that are normal or abnormal that will ignite a specified gas mixture. Electrical and thermal energy limits are at levels incapable of causing i






27. Inspection - analysis and action required to ensure quality of output.






28. The current that is gained by a transistor when it is connected in a common emitter circuit.






29. The energy delivered by a circuit or device. The electrical signal produced by the input to the transducer.






30. Commonly used in generators and motors - it is an electromagnet formed from a coil of insulated wire that is wound around a soft iron core.






31. Volt-ohm Meter.






32. An electrical circuit that is not 'made'. Contacts - switches or similar devices are open and preventing the floe of current.






33. kV; One thousand volts.






34. The resistance to electrical current. Resistance is measured in ohms.






35. The amount of time it takes for a device to react to an input signal.






36. Kw; One thousand watts.






37. NEMA;






38. FM; ~LINK~






39. The delayed period of time when outputs are turned off when power is initially applied.






40. The rapid on/off cycling of a relay caused by improper signal or adjustment - faulty contacts - or other malfunction.






41. A unit of energy in solid-state physics with mass and momentum but that does not exist as a free particle.






42. A unit of electric charge. The amount of charge conveyed in one second by one ampere.






43. A variable resistor.






44. Chemical changes and energy produced by electric currents.






45. (DC); Electrical current that flows consistently in one direction only.






46. A Solid State relay is a switching device that completes or interrupts a circuit electrically and has no moving parts. A Mechanical relay is an electromechanical device that closes contacts to complete a circuit or opens contacts to interrupt a circu






47. A rise and fall of voltage - current - or other faction that would be constant under normal conditions. A pulse that is intentionally induced will have a finite duration time.






48. Response to the change in the level of the input signal.






49. The output that is produced when one or more inputs are present.






50. Kwh; One thousand watt-hours.