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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. (DC); Electrical current that flows consistently in one direction only.






2. FM; ~LINK~






3. The average temperature of a process.






4. The voltage that is applied across a semiconductor junction to permit forward current through that junction and the device. Forward voltage is also known as 'bias.'






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






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






7. Radio Frequency Interference.






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






9. A variable resistor.






10. A switch with contacts that are made with actuating force and released when that force is removed.






11. Resistance Temperature Detector.






12. Symbol used to denote transmitter.






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






14. The maximum temperature at which a device can be safely operated.






15. 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.






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






17. Non-conducting material used to isolate and/or insulate energized electrical components.






18. One millionth of a volt.






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






20. Silicone Controlled Rectifier.






21. A temperature scale. Also known as centigrade. Sea level water will freeze at 0






22. OSHA;






23. CSA ~LINK~






24. The magnitude and time phase of a quantity - represented by a plotted line.






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






26. 'British Thermal Unit' - the amount of thermal energy required to raise one pound of water 1degree F. One BTU is equal to .293 watt hours. One kWh is equal to 3412 BTUs.






27. An electromagnetic radiation produced when the inner satellite electrons of heavy atoms have been excited by collision with a stream of fast electrons return to their ground state - giving up the energy previously imparted to them.






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






29. UL; ~LINK~






30. 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.






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






32. The resistance to electrical current. Resistance is measured in ohms.






33. Very High Frequency.






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






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






36. A device incorporating semiconductor material and suitable contacts capable of performing electrical functions (such as voltage - current or power amplification) with low power requirements.






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






38. 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.






39. 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.






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






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






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






43. 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






44. Kw; One thousand watts.






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






46. A switch in a controller that manually resets after exceeding the controllers limit.






47. 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.






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






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






50. A sudden and unwanted increase or decrease of supply voltage or current.







Sorry!:) No result found.

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