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






2. A tube - pipe or trough that carries and protects electric wiring.






3. 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.






4. 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.






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






6. Kwh; One thousand watt-hours.






7. SI; The standard metric system of units.






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






9. 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.






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






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






12. Variable Frequency.






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






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






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






16. One millionth of a meter.






17. Electrical energy produced by the action of heat.






18. Resistance Temperature Detector.






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






20. In a temperature controller it is the output form that provides a current proportional to the amount of control that is required. Commonly it is the 4 to 20 milliamp current proportioning band that is used in the electronics industry.






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. Radio Frequency Interference.






23. The electrical demand of a process. Load can be expressed or calculated as amps (current) - ohms (resistance) or watts (power).






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






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






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






27. One millionth of an amp.






28. UL; ~LINK~






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






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






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






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






33. Also known as Hertz - it is the number of complete cycles of periodic waveform that occur during a time period of one second.






34. To close an electrical circuit. To establish an electrical circuit through the closing of a contact - switch or other related device.






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






36. A form of silicone dioxide. Commonly used in the making of radio transmitters and heat resistant products.






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






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






39. Pounds per square inch differential. The difference in pressure between two points.






40. See; 'Maximum Power Rating'.






41. A circuit conductor that is grounded to become part of the electric circuit by design and intent.






42. 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.






43. 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






44. A device incorporating semiconductor material and suitable contacts capable of performing electrical functions (such as voltage - current or power amplification) with low power requirements.






45. 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.






46. Pressure that is less than atmospheric pressure.






47. (DC); Electrical current that flows consistently in one direction only.






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






49. 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.






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