Test your basic knowledge |

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






2. Very High Frequency.






3. SI; The standard metric system of units.






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






5. 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.






6. 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.






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






8. A variable resistor.






9. Ultra High Frequency






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






11. ISA;






12. The average temperature of a process.






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






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






15. One millionth of a volt.






16. 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






17. Mm; One thousandth of a meter.






18. A meter used to measure units of volts.






19. MA; One thousandth of an amp.






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






21. In a three phase connection all three phases are connected in series thus forming a closed circuit.






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






23. An electrical resistor composed of semiconductor material - whose resistance is a known rapidly varying function of temperature.






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






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






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






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






28. FM; ~LINK~






29. 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.






30. A connected path to earth or to a conductive body that has a reference potential to earth.






31. Silicone Controlled Rectifier.






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






33. UL; ~LINK~






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






35. 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.






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






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






38. EPA; ~LINK~






39. Non-conducting material used to isolate and/or insulate energized electrical components.






40. MV; One thousandth of a volt. The difference in potential needed to cause a current of one milliampere flow through a resistance of one ohm.






41. OSHA;






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






43. 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.






44. Expressed in webers - it is the product of the average normal component of the magnetic intensity over a surface and the area of that surface.






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






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






47. Pounds per square inch gage. Pressure in relationship to the ambient air pressure>






48. The rate of transfer of energy.






49. The interaction of magnetism and electrical current.






50. Symbol used to denote transformer.