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






2. 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.






3. Chemical changes and energy produced by electric currents.






4. FM; ~LINK~






5. A region of space that surrounds a moving electrical charge or a magnetic pole - in which the electrical charge or magnetic pole experiences a force that is above the electrostatic ones associated with particles at rest.






6. -459.67






7. To close an electrical circuit. To establish an electrical circuit through the closing of a contact - switch or other related device.






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






9. 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.






10. The amount of power that is consumed and converted to heat.






11. The range of temperature over which a device may be safely used. The temperature range which the device has been designed to operate.






12. Applying molecular physics to electronics.






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






14. 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






15. A form of control where the power supplied to a process is controlled by limiting the phase angle of the line voltage.






16. EPA; ~LINK~






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






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






19. A three mode control consisting of time Proportioning - Integral and Derivative rate action.






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






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






22. Ultra High Frequency






23. Pressure that is less than atmospheric pressure.






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






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






26. Symbol used to denote transmitter.






27. The conductor that is used by intent to connect the grounded circuit of an electrical wiring system or equipment to a grounding electrode with reference to earth.






28. An area in which combustible or flammable mixtures are or could be present.






29. Resistance Temperature Detector.






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






31. An electromagnetic radiation produced when the inner satellite electrons of heavy atoms have been excited by collision with a stream of fast electrons return to their ground state - giving up the energy previously imparted to them.






32. A meter used to measure electrical resistance in units of ohms.






33. The rate of transfer of energy.






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






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






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






37. Mm; One thousandth of a meter.






38. See; 'Proximity Sensor'.






39. ISA;






40. The unit of power. One watt equals one joule per second - 1/746th horsepower.






41. The pronounced curvature in reverse voltage current that is characteristic of a diode.






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






43. The form of radiation used to make non-contact temperature measurements. In the electromagnetic spectrum it is the area beyond red light from 760 nanometers to 1000 microns.






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






45. SI; The standard metric system of units.






46. The power of one watt operating for one hour - and equal to 3 -600 joules.






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






48. Radio Frequency Interference.






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






50. One millionth of a meter.







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