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






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






3. One millionth of an amp.






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






5. 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.






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






7. 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.'






8. A coil of wire wound about a magnetic material - such as iron - that produces a magnetic field when current flows through the wire.






9. One of the very small discrete packets into which many forms of energy are subdivided.






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






11. OSHA;






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






13. 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.






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






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






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






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






18. kV; One thousand volts.






19. 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.






20. One thousandth of an inch.






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






22. 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.






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






24. The measure of the ability of a material or substance to carry electrical current.






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






26. Electrical energy produced by the action of heat.






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






28. 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.






29. Kva; One thousand volt amps.






30. The range of temperature over which a device may be safely used. The temperature range which the device has been designed to operate.






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






32. A three mode control consisting of time Proportioning - Integral and Derivative rate action.






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






34. ISO;






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






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






37. See; 'Maximum Power Rating'.






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






39. The moving of electricity or heat through a conductor.






40. 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






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






42. The opposition to electrical flow.






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






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






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






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






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






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






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






50. Symbol used to denote transformer.