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 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.






2. 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.






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






4. Applying molecular physics to electronics.






5. Kwh; One thousand watt-hours.






6. Symbol used to denote transmitter.






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






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






9. One millionth of an amp.






10. The increase of the power level - current or voltage of a signal. In an amplifier it is the ratio of the output to the input signal levels.






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






12. A controller whose action is either fully on or off.






13. Normally Open.






14. 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.






15. A meter used to measure electrical resistance in units of ohms.






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






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






18. A variable resistor.






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






20. MA; One thousandth of an amp.






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






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






23. A solid-state switching device used in switching AC wave forms.






24. A meter used to measure units of volts.






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






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






27. Variable Frequency.






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






29. kV; One thousand volts.






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






31. One millionth of a volt.






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






33. Symbol for Mega - one million.






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






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






36. A hypothetical nuclear of a quark plus an antiproton.






37. -459.67






38. 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.'






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






40. Pressure that is less than atmospheric pressure.






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






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






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






44. 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.






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






46. See; 'Proximity Sensor'.






47. UL; ~LINK~






48. The pronounced curvature in reverse voltage current that is characteristic of a diode.






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






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.