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






2. 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.






3. ANSI;






4. MA; One thousandth of an amp.






5. The interaction of magnetism and electrical current.






6. UL; ~LINK~






7. Pressure that is less than atmospheric pressure.






8. 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.






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






10. 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






11. IEEE;






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






13. An ionized gas containing about equal numbers of positive and negative charges - which is a good conductor of electricity - and is affected by a magnetic field.






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






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






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






17. NFPA;






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






19. 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.






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






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






22. Kva; One thousand volt amps.






23. One millionth of an amp.






24. 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.






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






26. One millionth of a meter.






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






28. A circuit element or components that allows signals of certain frequencies to pass and blocks signals of other frequencies.






29. See; 'Proximity Sensor'.






30. ISA;






31. 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






32. ISO;






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






34. The average temperature of a process.






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






36. Chemical changes and energy produced by electric currents.






37. The magnitude and time phase of a quantity - represented by a plotted line.






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






39. Silicone Controlled Rectifier.






40. Mm; One thousandth of a meter.






41. 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






42. The opposition to electrical flow.






43. Normally Open.






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






45. 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.






46. The energy delivered by a circuit or device. The electrical signal produced by the input to the transducer.






47. The increase of the power level - current or voltage of a signal. In an amplifier it is the ratio of the output to the input signal levels.






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






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






50. NEMA;