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 full path of electrical current from a voltage source that passes completely from one terminal of the voltage source to another.






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






3. FM; ~LINK~






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






5. Kwh; One thousand watt-hours.






6. Radio Frequency Interference.






7. IEC;






8. Magnetically - opposite poles - north and south. In electricity - oppositely charged poles - positive and negative.






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






10. The opposition to electrical flow.






11. Electrical energy produced by the action of heat.






12. (ampere)The basic unit of current in an electrical circuit. One ampere is the rate of flow of electric current when one coulomb of charge flows past a point in the circuit in one second. Symbolically characterized by the letter 'I' and sometimes 'A'






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






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






15. Symbol used to denote transformer.






16. NEC: A set of regulations pertaining to electrical installation and design in the interest of the protection of life and property. The NEC is adopted by NFPA and approved by ANSI. It is the preferred standard of guidelines used by most electrical reg






17. UL; ~LINK~






18. IEEE;






19. 'Common Mode Voltage.' The voltage which is tolerable between signal and ground.






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






21. Chemical changes and energy produced by electric currents.






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






23. The adjustment of a display that results are zero on the display corresponding to a non-zero signal.






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






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






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






27. 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.






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






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






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






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






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






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






34. An ionized gas containing about equal numbers of positive and negative charges - which is a good conductor of electricity - and is affected by a magnetic field.






35. One millionth of a meter.






36. Very High Frequency.






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






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






39. 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.






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






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






42. See; 'Proximity Sensor'.






43. The average temperature of a process.






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






45. The range of voltage needed to maintain operation of a control or device.






46. The quality of having the ability to emit light when struck by electrons or another form of radiation.






47. Variable Frequency.






48. LED; A solid state light source component that emits light or invisible infrared radiation.






49. 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.






50. 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.