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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. Symbol for Mega - one million.






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






3. 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.






4. The interaction of magnetism and electrical current.






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






6. A hypothetical basic subatomic nuclear particle believed to be the basic component of protons - neutrons - etc.






7. A switch in a controller that manually resets after exceeding the controllers limit.






8. IBEW;






9. Output power divided by input power - (work performed in ratio to energy used to produce it).






10. ISO;






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






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






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






14. One thousandth of an inch.






15. The element inside a vacuum tube - incandescent lamp or other similar device.






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






17. A device used to store electrical energy in an electrostatic field until discharge.






18. One millionth of an amp.






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






20. Very High Frequency.






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






22. Normally Closed.






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






24. A coil of wire wound about a magnetic material - such as iron - that produces a magnetic field when current flows through the wire.






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






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






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






28. An electrically conductive fused salt or a solution where the charge is carried by ionic movement.






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






30. A negative (-) electrode. The point of entry of electrons into a device from an external circuit. The negative electrode of a semiconductor diode.






31. Resistance Temperature Detector.






32. The basic of thermal energy. The work done by the force of one newton acting through a distance of one meter.






33. A device that transfers power or energy from one system to another - such as taking a physical quality and changing it to an electrical signal.






34. MA; One thousandth of an amp.






35. A unit of electrical current named after French physicist Andr






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






37. A form of energy produced by the flow of particles of matter and consists of commonly attractive positively (protons [+]) and negatively (electrons [-]) charged atomic particles. A stream of electrons - or an electric current.






38. A panel meter with zero and span adjustments - commonly scaled for signals such as 1-5 volts - 4-20mA - etc.






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






40. One millionth of a meter.






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






42. Electrical energy produced by the action of heat.






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






44. 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.






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






46. (AC); Electrical current that changes (or alternates) in magnitude and direction of the current at regular intervals.






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






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






49. See; 'Proximity Sensor'.






50. A meter used to measure units of volts.







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