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Electrical Components

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes. 2 minutes extra for reading the instructions.
  • 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. The resistance to electrical current. Resistance is measured in ohms.






2. Expressed in webers - it is the product of the average normal component of the magnetic intensity over a surface and the area of that surface.






3. One millionth of a meter.






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






5. 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






6. UL; ~LINK~






7. Resistance Temperature Detector.






8. -459.67






9. A process that is kept at a constant temperature.






10. A highly accurate bridge configuration that is used to measure three-wire RTD thermometers.






11. Current Consumption. The amount of amps or milliamps needed to maintain operation of a control or device.






12. Radio Frequency Interference.






13. Chemical changes and energy produced by electric currents.






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






15. The part of a circuit that supplies power to the entire circuit or part of the circuit. Usually a separate unit that supplies power to a specific part of the circuit in a system.






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






17. 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






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






19. One millionth of a volt.






20. When there is current through a semiconductor p-n junction it is the resistance of a forward-biased junction.






21. An ionized gas containing about equal numbers of positive and negative charges - which is a good conductor of electricity - and is affected by a magnetic field.






22. The moving of electricity or heat through a conductor.






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






24. An interconnected arrangement of parts for carrying high-voltage electricity.






25. IEEE;






26. A material used to conduct electricity or heat.






27. That part of a circuit which is physically interconnected.






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






29. The adjustment of a display that results are zero on the display corresponding to a non-zero signal.






30. MLS; A photoelectric control that operates on pulsed infrared radiation at a specific frequency - and responds only to that frequency of pulse. MLS is used frequently in areas where ambient light may cause problems with other types of sensors.






31. 'American Wire Gauge' system used to determine wire size.






32. The quality of having the ability to emit light when struck by electrons or another form of radiation.






33. The average temperature of a process.






34. A small current leaking from an output device in the off state caused by semiconductor characteristics.






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






36. The time it takes for a controller to complete one on/off cycle.






37. A variable resistor.






38. The measured amount of electrical energy that represents the electrostatic forces between atomic particles. The nucleus of an atom has a positive charge (+) and the electrons have a negative charge(-).






39. 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.






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






41. A full-wave rectifier where the diodes are connected in a bridge circuit. This allows the current to the load during both the positive and negative alternating of the supply voltage.






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






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






44. A temperature scale. Also known as centigrade. Sea level water will freeze at 0






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






46. FM; ~LINK~






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






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






49. 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






50. The standard unit of magnetic flux.






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