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. 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.






2. -459.67






3. The time based relationship between a reference and a periodic function.






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






5. Symbol for Mega - one million.






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






7. (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'






8. MA; One thousandth of an amp.






9. Magnetically - opposite poles - north and south. In electricity - oppositely charged poles - positive and negative.






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






11. A device that transfers power or energy from one system to another - such as taking a physical quality and changing it to an electrical signal.






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






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






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






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






16. See; 'Maximum Power Rating'.






17. OSHA;






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






19. A sensor or switch with the ability to detect it's relationship to a metal target without making physical contact.






20. NEMA;






21. Very High Frequency.






22. 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.






23. Symbol used to denote transformer.






24. 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






25. Variable Frequency.






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






27. The average temperature of a process.






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






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






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






31. The electrical demand of a process. Load can be expressed or calculated as amps (current) - ohms (resistance) or watts (power).






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






33. 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.






34. See; 'Proximity Sensor'.






35. 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.






36. One of the very small discrete packets into which many forms of energy are subdivided.






37. Pounds per square inch gage. Pressure in relationship to the ambient air pressure>






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






39. SI; The standard metric system of units.






40. The rate at which electricity flows - measured in amperes - 1 ampere = 1 coulomb per second.






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






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






43. IBEW;






44. An anode (+) or cathode (-) conductor on a device through which an electric current passes.






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






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






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






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






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






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