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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. Mm; One thousandth of a meter.






2. 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.






3. EPA; ~LINK~






4. A meter used to measure units of volts.






5. The measure of the ability of a material or substance to carry electrical current.






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






7. A process that is kept at a constant temperature.






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






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






10. Kw; One thousand watts.






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






12. IBEW;






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






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






16. One millionth of a volt.






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






18. A full-wave rectifier where the diodes are connected in a bridge circuit. This allows the current to the load during both the positive and negative alternating of the supply voltage.






19. 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.






20. MLS; A photoelectric control that operates on pulsed infrared radiation at a specific frequency - and responds only to that frequency of pulse. MLS is used frequently in areas where ambient light may cause problems with other types of sensors.






21. 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.






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






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






24. See; 'Proximity Sensor'.






25. Inspection - analysis and action required to ensure quality of output.






26. Kva; One thousand volt amps.






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






28. The basic of thermal energy. The work done by the force of one newton acting through a distance of one meter.






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






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






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






32. 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






33. UL; ~LINK~






34. Symbol for Mega - one million.






35. 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.






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






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






38. FM; ~LINK~






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






40. A material used to conduct electricity or heat.






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






42. NFPA;






43. Symbol used to denote transmitter.






44. 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






45. Resistance Temperature Detector.






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






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






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






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






50. Symbol used for wye configuration for three phase electrical connections.







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