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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 device that converts AC voltage to pulsating DC voltage.






2. IEEE;






3. 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.






4. 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.






5. (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'






6. A circuit which may have one or many resistors and/or other various devices connected in a series so that the current has only one path to follow.






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






8. -459.67






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






10. UL; ~LINK~






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






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






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






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






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






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






17. A device - instrument or component that will not produce any spark or thermal effects under any conditions that are normal or abnormal that will ignite a specified gas mixture. Electrical and thermal energy limits are at levels incapable of causing i






18. Symbol used to denote transformer.






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






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






21. The form of radiation used to make non-contact temperature measurements. In the electromagnetic spectrum it is the area beyond red light from 760 nanometers to 1000 microns.






22. Very High Frequency.






23. CSA ~LINK~






24. Voltage; The unit of electromotive force (EMF) that causes current to flow. One volt causes a current of one amp through a resistance of one ohm.






25. See; 'Maximum Power Rating'.






26. A form of energy produced by the flow of particles of matter and consists of commonly attractive positively (protons [+]) and negatively (electrons [-]) charged atomic particles. A stream of electrons - or an electric current.






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






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






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






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






31. The conductor that is used by intent to connect the grounded circuit of an electrical wiring system or equipment to a grounding electrode with reference to earth.






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






33. A negative (-) electrode. The point of entry of electrons into a device from an external circuit. The negative electrode of a semiconductor diode.






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






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






36. The unit for capacitance. A capacitor that stored one coulomb of charge with one volt across it will have a value of one farad.






37. One thousandth of an inch.






38. Symbol used to denote transmitter.






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






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






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






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






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






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






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






46. An electrically conductive fused salt or a solution where the charge is carried by ionic movement.






47. ANSI;






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






49. That part of a circuit which is physically interconnected.






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






Can you answer 50 questions in 15 minutes?



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