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. A circuit conductor that is grounded to become part of the electric circuit by design and intent.






2. ISO;






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






4. See; 'Proximity Sensor'.






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






6. Also known as Hertz - it is the number of complete cycles of periodic waveform that occur during a time period of one second.






7. The standard that is used to make comparison measurements or calibrations.






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






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






10. Symbol used for wye configuration for three phase electrical connections.






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






12. Symbol for Mega - one million.






13. Radio Frequency Interference.






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






15. Kw; One thousand watts.






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






17. A high-intensity incandescent lamp with a quartz bulb containing an inert gas of iodine or bromine vapor.






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






19. The amount of energy released in a nuclear reaction. It is expressed in atomic mass units - or in million electron volts (MEV).






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






21. The opposition to electrical flow.






22. A form of silicone dioxide. Commonly used in the making of radio transmitters and heat resistant products.






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






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






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






26. The maximum temperature at which a device can be safely operated.






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






28. One millionth of a volt.






29. Kwh; One thousand watt-hours.






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






32. Electrical energy produced by the action of heat.






33. 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.






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






35. 'British Thermal Unit' - the amount of thermal energy required to raise one pound of water 1degree F. One BTU is equal to .293 watt hours. One kWh is equal to 3412 BTUs.






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






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






38. kV; One thousand volts.






39. FM; ~LINK~






40. One millionth of an amp.






41. Voltage; The unit of electromotive force (EMF) that causes current to flow. One volt causes a current of one amp through a resistance of one ohm.






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






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






44. A fundamental negatively (-) charged atomic particle that rotates around a positively (+) charged nucleus of the atom.






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






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






47. 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






48. Very High Frequency.






49. NEMA;






50. The method by which two devices or systems are connected and interact with each other.