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. ISO;






2. A switch with contacts that are made with actuating force and released when that force is removed.






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






4. A device incorporating semiconductor material and suitable contacts capable of performing electrical functions (such as voltage - current or power amplification) with low power requirements.






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






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






7. The voltage that is applied across a semiconductor junction to permit forward current through that junction and the device. Forward voltage is also known as 'bias.'






8. The unit by which electrical resistance is measured. One ohm is equal to the current of one ampere which will flow when a voltage of one volt is applied






9. A controller whose action is either fully on or off.






10. Chemical changes and energy produced by electric currents.






11. An arrangement of any of various conductors through which electric current can flow from a supply current.






12. Silicone Controlled Rectifier.






13. The interaction of magnetism and electrical current.






14. A device that converts AC voltage to pulsating DC voltage.






15. The time delay between the output signal and the response time of the receiver of the signal.






16. A silicone semiconductor that maintains a fixed voltage in a circuit.






17. Volt-ohm Meter.






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






19. The standard unit of magnetic flux.






20. IEEE;






21. Or Hertz; The measurement of the time period of one alternating electric current. In the United States this is commonly 60 cycles per second - or 60 Hertz.






22. MA; One thousandth of an amp.






23. A sensor or switch with the ability to detect it's relationship to a metal target without making physical contact.






24. An electrical resistor composed of semiconductor material - whose resistance is a known rapidly varying function of temperature.






25. The opposition to electrical flow.






26. SI; The standard metric system of units.






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






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






29. A switching device used in switching high DC loads. It contains a small permanent magnet which deflects arc in order to quench it.






30. A hypothetical nuclear of a quark plus an antiproton.






31. One millionth of a meter.






32. A material used to conduct electricity or heat.






33. IBEW;






34. A solid-state switching device for semiconductors to convert AC current in one of two directions controlled by an electrode.






35. 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






36. Variable Frequency.






37. The speed or time rate of change of displacement.






38. Two dissimilar metals connected at a point - that produce an electrical current whose magnitude is dependent upon the temperature at the junction point.






39. A tube - pipe or trough that carries and protects electric wiring.






40. Kva; One thousand volt amps.






41. LED; A solid state light source component that emits light or invisible infrared radiation.






42. The act of the opening of an electrical circuit.






43. Protective circuitry to guard against spikes that might be induced on the supply line.






44. EPA; ~LINK~






45. Non-conducting material used to isolate and/or insulate energized electrical components.






46. In a temperature controller it is the output form that provides a current proportional to the amount of control that is required. Commonly it is the 4 to 20 milliamp current proportioning band that is used in the electronics industry.






47. A full path of electrical current from a voltage source that passes completely from one terminal of the voltage source to another.






48. In a three phase connection all three phases are connected in series thus forming a closed circuit.






49. Symbol for Mega - one million.






50. Very High Frequency.