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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. ANSI;






2. A material used to conduct electricity or heat.






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






4. 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.






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






6. 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






7. The modification of a signal that causes the output to remain energized until it is released by intent.






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






9. SI; The standard metric system of units.






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






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






12. Chemical changes and energy produced by electric currents.






13. FM; ~LINK~






14. European environmental ratings. Similar to NEMA ratings in the USA. IP;*site has NEMA comparisons ~LINK~






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






16. 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






17. Symbol for Mega - one million.






18. 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.






19. Volt-ohm Meter.






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






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






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






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






24. Variable Frequency.






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






26. See; 'Proximity Sensor'.






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






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






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






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






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






32. The standard unit of magnetic flux.






33. The opposition to electrical flow.






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






35. 'Common Mode Voltage.' The voltage which is tolerable between signal and ground.






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






37. IEC;






38. 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.






39. Silicone Controlled Rectifier.






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






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






42. Electric and magnetic force field that surrounds a moving electric charge.






43. A variable resistor.






44. Very High Frequency.






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






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






47. 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.






48. A three terminal semiconductor device. In a 'FET' the current is from source to drain because a conducting channel is formed by a voltage field between the gate and the source.






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






50. The maximum watts that a device can safely handle.







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