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. Symbol for Mega - one million.






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






3. -459.67






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






5. The increase of the power level - current or voltage of a signal. In an amplifier it is the ratio of the output to the input signal levels.






6. 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.






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






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






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






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






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






12. NEMA;






13. A circuit conductor that is grounded to become part of the electric circuit by design and intent.






14. 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.






15. FM; ~LINK~






16. Ultra High Frequency






17. The rate of transfer of energy.






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






19. 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.






20. Kw; One thousand watts.






21. The average temperature of a process.






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






23. Pressure that is less than atmospheric pressure.






24. RMS; AC voltage that equals DC voltage that will do the same amount of work. For an AC sine wave it is 0.707 x peak voltage.






25. EPA; ~LINK~






26. Electrical energy produced by the action of heat.






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






28. 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.






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






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






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






32. A solid-state switching device used in switching AC wave forms.






33. Very High Frequency.






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






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






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






37. ISO;






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






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






40. The conductor that is used by intent to connect the grounded circuit of an electrical wiring system or equipment to a grounding electrode with reference to earth.






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






42. Kwh; One thousand watt-hours.






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






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






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






46. 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.






47. IBEW;






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






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






50. 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.