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 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






2. -459.67






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






4. The interaction of magnetism and electrical current.






5. Pounds per square inch differential. The difference in pressure between two points.






6. 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.






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






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






9. IEC;






10. CSA ~LINK~






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






12. SI; The standard metric system of units.






13. Pressure that is less than atmospheric pressure.






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






15. The behavior of charged particles and the steady motion of charge in magnetic and electric fields.






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






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






18. 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.






19. 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.






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






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






22. NEMA;






23. 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(-).






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






25. 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.






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






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






28. A negative (-) electrode. The point of entry of electrons into a device from an external circuit. The negative electrode of a semiconductor diode.






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






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






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






32. The unit of power. One watt equals one joule per second - 1/746th horsepower.






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






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






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






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






37. In a temperature controller it is the output form that provides a current proportional to the amount of control that is required. Commonly it is the 4 to 20 milliamp current proportioning band that is used in the electronics industry.






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






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






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






41. Resistance Temperature Detector.






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






43. Variable Frequency.






44. A hypothetical basic subatomic nuclear particle believed to be the basic component of protons - neutrons - etc.






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






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






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






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






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






50. 'American Wire Gauge' system used to determine wire size.