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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. NEC: A set of regulations pertaining to electrical installation and design in the interest of the protection of life and property. The NEC is adopted by NFPA and approved by ANSI. It is the preferred standard of guidelines used by most electrical reg






2. One millionth of a volt.






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






4. Symbol used to denote transformer.






5. UL; ~LINK~






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






7. 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






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






9. One millionth of an amp.






10. 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(-).






11. 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.






12. Symbol for Mega - one million.






13. Normally Closed.






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






15. 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.






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






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






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






19. A material used to conduct electricity or heat.






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






21. The unit for capacitance. A capacitor that stored one coulomb of charge with one volt across it will have a value of one farad.






22. FM; ~LINK~






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






24. ANSI;






25. Response to the change in the level of the input signal.






26. The interaction of magnetism and electrical current.






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






28. Resistance Temperature Detector.






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






30. One thousandth of an inch.






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






32. Kw; One thousand watts.






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






34. Symbol used to denote transmitter.






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






36. Normally Open.






37. The rapid on/off cycling of a relay caused by improper signal or adjustment - faulty contacts - or other malfunction.






38. 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.






39. Commonly used in generators and motors - it is an electromagnet formed from a coil of insulated wire that is wound around a soft iron core.






40. Volt-ohm Meter.






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






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






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






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






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






46. An interconnected arrangement of parts for carrying high-voltage electricity.






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






48. '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.






49. Pressure that is less than atmospheric pressure.






50. Radio Frequency Interference.







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