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. EPA; ~LINK~






2. IEC;






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






4. The rate of transfer of energy.






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






6. Intensity. The commonly used symbol used to represent Amperes when used in formulas. I = Intensity = Current = Amps = Amperes.






7. Kw; One thousand watts.






8. UL; ~LINK~






9. -459.67






10. The pronounced curvature in reverse voltage current that is characteristic of a diode.






11. A meter used to measure units of volts.






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






13. Variable Frequency.






14. 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






15. A rise and fall of voltage - current - or other faction that would be constant under normal conditions. A pulse that is intentionally induced will have a finite duration time.






16. 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.






17. ISA;






18. ISO;






19. One millionth of an amp.






20. Symbol used to denote transformer.






21. Electrical energy produced by the action of heat.






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






23. A sensor or switch with the ability to detect it's relationship to a metal target without making physical contact.






24. A material used to conduct electricity or heat.






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






26. MA; One thousandth of an amp.






27. A three terminal semiconductor device. In a 'FET' the current is from source to drain because a conducting channel is formed by a voltage field between the gate and the source.






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






29. 'American Wire Gauge' system used to determine wire size.






30. Silicone Controlled Rectifier.






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






32. One thousandth of an inch.






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






34. Chemical changes and energy produced by electric currents.






35. ANSI;






36. SI; The standard metric system of units.






37. The time delay between the output signal and the response time of the receiver of the signal.






38. 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(-).






39. Mm; One thousandth of a meter.






40. Symbol for Mega - one million.






41. The range of voltage needed to maintain operation of a control or device.






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






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






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






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






46. 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.






47. Kwh; One thousand watt-hours.






48. A switching device used in switching high DC loads. It contains a small permanent magnet which deflects arc in order to quench it.






49. The electrical demand of a process. Load can be expressed or calculated as amps (current) - ohms (resistance) or watts (power).






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