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






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






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






4. Electrical energy produced by the action of heat.






5. 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.






6. The conductor that is used by intent to connect the grounded circuit of an electrical wiring system or equipment to a grounding electrode with reference to earth.






7. Resistance Temperature Detector.






8. Pounds per square inch absolute. Pressure commonly in reference to vacuum.






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






10. The current that is gained by a transistor when it is connected in a common emitter circuit.






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






12. The time delay between the output signal and the response time of the receiver of the signal.






13. ANSI;






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






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






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






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






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






19. The rate of transfer of energy.






20. A meter used to measure units of volts.






21. A device having two terminals and has a low resistance to electrical current in one direction and a high resistance in the other direction.






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






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






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






25. Silicone Controlled Rectifier.






26. See; 'Proximity Sensor'.






27. ISO;






28. EPA; ~LINK~






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






30. That part of a circuit which is physically interconnected.






31. The opposition to electrical flow.






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






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






34. 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.'






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






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






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






38. 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






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






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






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






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






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






45. 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.






46. The time based relationship between a reference and a periodic function.






47. One thousandth of an inch.






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






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






50. European environmental ratings. Similar to NEMA ratings in the USA. IP;*site has NEMA comparisons ~LINK~