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. OSHA;






2. 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






3. 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.






4. 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.






5. CSA ~LINK~






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






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






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






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






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






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






12. 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






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






14. Resistance Temperature Detector.






15. Pounds per square inch absolute. Pressure commonly in reference to vacuum.






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






17. 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.






18. Variable Frequency.






19. A meter used to measure units of volts.






20. A form of control where the power supplied to a process is controlled by limiting the phase angle of the line voltage.






21. Volt-ohm Meter.






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






23. An ionized gas containing about equal numbers of positive and negative charges - which is a good conductor of electricity - and is affected by a magnetic field.






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






25. The amount of energy released in a nuclear reaction. It is expressed in atomic mass units - or in million electron volts (MEV).






26. 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.






27. The quality of having the ability to emit light when struck by electrons or another form of radiation.






28. Very High Frequency.






29. 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.






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






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






32. IEC;






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






34. One millionth of a meter.






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






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






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






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






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






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






41. 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.






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






43. Kw; One thousand watts.






44. ANSI;






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






46. Symbol for Mega - one million.






47. -459.67






48. Radio Frequency Interference.






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






50. IBEW;