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. Normally Closed.






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






3. Volt-ohm Meter.






4. NFPA;






5. NEMA;






6. Mm; One thousandth of a meter.






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






8. 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.'






9. Chemical changes and energy produced by electric currents.






10. -459.67






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






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






13. The opposition to electrical flow.






14. Pressure that is less than atmospheric pressure.






15. 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.






16. Electric current passing through an electrolyte which produces chemical changes in it.






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






18. UL; ~LINK~






19. A high-intensity incandescent lamp with a quartz bulb containing an inert gas of iodine or bromine vapor.






20. See; 'Maximum Power Rating'.






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






22. One thousandth of an inch.






23. 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.






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






25. A meter used to measure units of volts.






26. 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.






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






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






29. kV; One thousand volts.






30. 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.






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






32. Kw; One thousand watts.






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






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






35. Applying molecular physics to electronics.






36. Very High Frequency.






37. SI; The standard metric system of units.






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






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






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






41. A panel meter with zero and span adjustments - commonly scaled for signals such as 1-5 volts - 4-20mA - etc.






42. One millionth of a volt.






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






44. A unit of electrical current named after French physicist Andr






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






46. (AC); Electrical current that changes (or alternates) in magnitude and direction of the current at regular intervals.






47. An electromagnetic radiation produced when the inner satellite electrons of heavy atoms have been excited by collision with a stream of fast electrons return to their ground state - giving up the energy previously imparted to them.






48. 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.






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






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