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






2. IBEW;






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






4. 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.






5. Variable Frequency.






6. 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.






7. The amount of time it takes for a device to react to an input signal.






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






9. FM; ~LINK~






10. Kw; One thousand watts.






11. One millionth of a meter.






12. UL; ~LINK~






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






14. 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.






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






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






17. Symbol for Mega - one million.






18. The time it takes for a controller to complete one on/off cycle.






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






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






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






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






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






24. A Solid State relay is a switching device that completes or interrupts a circuit electrically and has no moving parts. A Mechanical relay is an electromechanical device that closes contacts to complete a circuit or opens contacts to interrupt a circu






25. Very High Frequency.






26. Pounds per square inch absolute. Pressure commonly in reference to vacuum.






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






28. A meter used to measure units of volts.






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






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






31. CSA ~LINK~






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






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






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






35. The unit by which electrical resistance is measured. One ohm is equal to the current of one ampere which will flow when a voltage of one volt is applied






36. Radio Frequency Interference.






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






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






39. 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.






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






41. See; 'Proximity Sensor'.






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






43. An ionized gas containing about equal numbers of positive and negative charges - which is a good conductor of electricity - and is affected by a magnetic field.






44. A hypothetical nuclear of a quark plus an antiproton.






45. '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.






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






47. Resistance Temperature Detector.






48. 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.






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






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