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 area in which combustible or flammable mixtures are or could be present.






2. 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.






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






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






5. 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






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






7. See; 'Proximity Sensor'.






8. Chemical changes and energy produced by electric currents.






9. Kw; One thousand watts.






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






11. Radio Frequency Interference.






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






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






14. Mm; One thousandth of a meter.






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






16. Silicone Controlled Rectifier.






17. UL; ~LINK~






18. A small current leaking from an output device in the off state caused by semiconductor characteristics.






19. The standard that is used to make comparison measurements or calibrations.






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






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






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






23. FM; ~LINK~






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






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






26. One millionth of an amp.






27. 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.






28. The interaction of magnetism and electrical current.






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






30. '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.






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






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






33. The power of one watt operating for one hour - and equal to 3 -600 joules.






34. Pressure that is less than atmospheric pressure.






35. 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.






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






37. 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.






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






39. 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






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






41. Resistance Temperature Detector.






42. A variable resistor.






43. Very High Frequency.






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






45. EPA; ~LINK~






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






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






48. ISA;






49. The difference in potential measured between two points caused by resistance or impedance.






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