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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. 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.






2. 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






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






4. Symbol used to denote transmitter.






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






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






7. IEEE;






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






9. 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(-).






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






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






12. A circuit which may have one or many resistors and/or other various devices connected in a series so that the current has only one path to follow.






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






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






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






16. RMS; AC voltage that equals DC voltage that will do the same amount of work. For an AC sine wave it is 0.707 x peak voltage.






17. A sudden and unwanted increase or decrease of supply voltage or current.






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






19. Normally Closed.






20. The mechanism of a switch which operates the contacts.






21. The rate at which electricity flows - measured in amperes - 1 ampere = 1 coulomb per second.






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






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






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






25. The measure of the ability of a material or substance to carry electrical current.






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






27. The amount of heat needed to convert one pound of water to one pound of steam. Latent heat is expressed in BTU per pound.






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






29. 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






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






31. 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.






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






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






34. IEC;






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






36. CSA ~LINK~






37. One millionth of a volt.






38. 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.






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






40. Normally Open.






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






42. The voltage that is applied across a semiconductor junction to permit forward current through that junction and the device. Forward voltage is also known as 'bias.'






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






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






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






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






47. The delayed period of time when outputs are turned off when power is initially applied.






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






49. NEMA;






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