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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. 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.






2. An electrical circuit that increases the power - voltage or current of an applied signal.






3. 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(-).






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






5. 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.






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






7. Chemical changes and energy produced by electric currents.






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






9. When there is current through a semiconductor p-n junction it is the resistance of a forward-biased junction.






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






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






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






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






14. -459.67






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






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






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






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






19. The rate at which electricity flows - measured in amperes - 1 ampere = 1 coulomb per second.






20. 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.






21. One millionth of a meter.






22. 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.






23. 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






24. A unit of electric charge. The amount of charge conveyed in one second by one ampere.






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






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






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






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






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






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






31. An anode (+) or cathode (-) conductor on a device through which an electric current passes.






32. The delayed period of time when outputs are turned off when power is initially applied.






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






34. Symbol used to denote transformer.






35. The standard unit of magnetic flux.






36. Radio Frequency Interference.






37. ISA;






38. A device used to store electrical energy in an electrostatic field until discharge.






39. A coil of wire wound about a magnetic material - such as iron - that produces a magnetic field when current flows through the wire.






40. The amount of time it takes for a device to react to an input signal.






41. A variable resistor.






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






43. Kw; One thousand watts.






44. Kva; One thousand volt amps.






45. The average temperature of a process.






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






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






48. The mechanism of a switch which operates the contacts.






49. 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.






50. 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.