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 temperature scale. Also known as centigrade. Sea level water will freeze at 0






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






3. Response to the change in the level of the input signal.






4. 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.






5. Mm; One thousandth of a meter.






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






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






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






9. Ultra High Frequency






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






11. OSHA;






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






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






14. The current that is gained by a transistor when it is connected in a common emitter circuit.






15. Electric and magnetic force field that surrounds a moving electric charge.






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






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






18. The maximum watts that a device can safely handle.






19. 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.






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






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






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






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






24. The energy delivered by a circuit or device. The electrical signal produced by the input to the transducer.






25. The form of radiation used to make non-contact temperature measurements. In the electromagnetic spectrum it is the area beyond red light from 760 nanometers to 1000 microns.






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






27. UL; ~LINK~






28. Resistance Temperature Detector.






29. Symbol for Mega - one million.






30. 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






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






32. The rate of transfer of energy.






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






34. A positive (+) electrode. The point where electrons exit from a device to the external electric circuit.






35. (DC); Electrical current that flows consistently in one direction only.






36. An electrical resistor composed of semiconductor material - whose resistance is a known rapidly varying function of temperature.






37. NFPA;






38. Radio Frequency Interference.






39. A silicone semiconductor that maintains a fixed voltage in a circuit.






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






41. NEMA;






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






43. One millionth of a volt.






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






45. ISO;






46. 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.






47. A device - instrument or component that will not produce any spark or thermal effects under any conditions that are normal or abnormal that will ignite a specified gas mixture. Electrical and thermal energy limits are at levels incapable of causing i






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






49. MV; One thousandth of a volt. The difference in potential needed to cause a current of one milliampere flow through a resistance of one ohm.






50. MA; One thousandth of an amp.