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






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






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






4. 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.






5. A Solid State relay is a switching device that completes or interrupts a circuit electrically and has no moving parts. A Mechanical relay is an electromechanical device that closes contacts to complete a circuit or opens contacts to interrupt a circu






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






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






8. Symbol used to denote transformer.






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






10. A device that converts AC voltage to pulsating DC voltage.






11. NEMA;






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






13. See; 'Proximity Sensor'.






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






15. A solid-state switching device for semiconductors to convert AC current in one of two directions controlled by an electrode.






16. FM; ~LINK~






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






18. The rate of transfer of energy.






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






20. The act of the opening of an electrical circuit.






21. IBEW;






22. Kw; One thousand watts.






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






24. Commonly used in generators and motors - it is an electromagnet formed from a coil of insulated wire that is wound around a soft iron core.






25. 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.






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






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






28. 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






29. A fundamental negatively (-) charged atomic particle that rotates around a positively (+) charged nucleus of the atom.






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






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






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






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






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






35. SI; The standard metric system of units.






36. OSHA;






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






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






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






40. One thousandth of an inch.






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






42. Ultra High Frequency






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






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






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






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






47. MA; One thousandth of an amp.






48. kV; One thousand volts.






49. ANSI;






50. Expressed in webers - it is the product of the average normal component of the magnetic intensity over a surface and the area of that surface.