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






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






3. 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.






4. The unit by which electrical resistance is measured. One ohm is equal to the current of one ampere which will flow when a voltage of one volt is applied






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






6. One millionth of a volt.






7. Applying molecular physics to electronics.






8. Output power divided by input power - (work performed in ratio to energy used to produce it).






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






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






11. MLS; A photoelectric control that operates on pulsed infrared radiation at a specific frequency - and responds only to that frequency of pulse. MLS is used frequently in areas where ambient light may cause problems with other types of sensors.






12. The time it takes for a controller to complete one on/off cycle.






13. Inspection - analysis and action required to ensure quality of output.






14. 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.






15. 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.






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






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






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






19. Resistance Temperature Detector.






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






21. 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






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






23. The rate of transfer of energy.






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






25. Volt-ohm Meter.






26. Voltage; The unit of electromotive force (EMF) that causes current to flow. One volt causes a current of one amp through a resistance of one ohm.






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






28. The opposition to electrical flow.






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






30. A process that is kept at a constant temperature.






31. Normally Open.






32. A rise and fall of voltage - current - or other faction that would be constant under normal conditions. A pulse that is intentionally induced will have a finite duration time.






33. A positive (+) electrode. The point where electrons exit from a device to the external electric circuit.






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






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






36. A form of control where the power supplied to a process is controlled by limiting the phase angle of the line voltage.






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






38. The speed or time rate of change of displacement.






39. The amount of energy released in a nuclear reaction. It is expressed in atomic mass units - or in million electron volts (MEV).






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






41. 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.






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






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






44. 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.






45. The measured amount of electrical energy that represents the electrostatic forces between atomic particles. The nucleus of an atom has a positive charge (+) and the electrons have a negative charge(-).






46. Symbol for Mega - one million.






47. A temperature scale. Also known as centigrade. Sea level water will freeze at 0






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






49. A unit of electric charge. The amount of charge conveyed in one second by one ampere.






50. A material used to conduct electricity or heat.