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






2. Ultra High Frequency






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






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






5. The rapid on/off cycling of a relay caused by improper signal or adjustment - faulty contacts - or other malfunction.






6. ISA;






7. 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.






8. Resistance Temperature Detector.






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






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






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






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






13. -459.67






14. MA; One thousandth of an amp.






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






16. Chemical changes and energy produced by electric currents.






17. Output power divided by input power - (work performed in ratio to energy used to produce it).






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






19. The standard unit of magnetic flux.






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






21. Current Consumption. The amount of amps or milliamps needed to maintain operation of a control or device.






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






23. The increase of the power level - current or voltage of a signal. In an amplifier it is the ratio of the output to the input signal levels.






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






25. A reference point at zero potential with respect to the earth. In an electronic circuit it is the common return path for electric current. A conducting connection between the earth and an electrical circuit or electrical equipment. Also - the negativ






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






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






28. The part of a circuit that supplies power to the entire circuit or part of the circuit. Usually a separate unit that supplies power to a specific part of the circuit in a system.






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






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






31. ANSI;






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






33. Kva; One thousand volt amps.






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






35. 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.






36. Variable Frequency.






37. Symbol for Mega - one million.






38. One thousandth of an inch.






39. See; 'Proximity Sensor'.






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






41. European environmental ratings. Similar to NEMA ratings in the USA. IP;*site has NEMA comparisons ~LINK~






42. Silicone Controlled Rectifier.






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






44. Electrical energy produced by the action of heat.






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






46. (ampere)The basic unit of current in an electrical circuit. One ampere is the rate of flow of electric current when one coulomb of charge flows past a point in the circuit in one second. Symbolically characterized by the letter 'I' and sometimes 'A'






47. 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(-).






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






49. The amount of power that is consumed and converted to heat.






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






Can you answer 50 questions in 15 minutes?



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