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 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






2. Expressed in webers - it is the product of the average normal component of the magnetic intensity over a surface and the area of that surface.






3. A connected path to earth or to a conductive body that has a reference potential to earth.






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






5. Silicone Controlled Rectifier.






6. Electric current passing through an electrolyte which produces chemical changes in it.






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






8. The opposition to electrical flow.






9. CSA ~LINK~






10. A unit of electrical current named after French physicist Andr






11. The modification of a signal that causes the output to remain energized until it is released by intent.






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






13. 'Common Mode Voltage.' The voltage which is tolerable between signal and ground.






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






15. The part of a circuit that supplies power to the entire circuit or part of the circuit. Usually a separate unit that supplies power to a specific part of the circuit in a system.






16. IBEW;






17. Response to the change in the level of the input signal.






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






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






20. The rate of transfer of energy.






21. One thousandth of an inch.






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






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






24. 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.






25. 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






26. A circuit element or components that allows signals of certain frequencies to pass and blocks signals of other frequencies.






27. The power of one watt operating for one hour - and equal to 3 -600 joules.






28. The behavior of charged particles and the steady motion of charge in magnetic and electric fields.






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






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






31. 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.






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






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






34. '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.






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






36. FM; ~LINK~






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






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






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






40. Normally Closed.






41. A form of silicone dioxide. Commonly used in the making of radio transmitters and heat resistant products.






42. A three mode control consisting of time Proportioning - Integral and Derivative rate action.






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






44. -459.67






45. Normally Open.






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






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






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






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






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