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






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






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






4. Pressure that is less than atmospheric pressure.






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






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






7. IBEW;






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






9. A variable resistor.






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






11. One millionth of an amp.






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






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






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






15. 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.






16. A controller whose action is either fully on or off.






17. One thousandth of an inch.






18. The amount of power that is consumed and converted to heat.






19. SI; The standard metric system of units.






20. The measured amount of electrical energy that represents the electrostatic forces between atomic particles. The nucleus of an atom has a positive charge (+) and the electrons have a negative charge(-).






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






22. A panel meter with zero and span adjustments - commonly scaled for signals such as 1-5 volts - 4-20mA - etc.






23. 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.






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






25. The standard unit of magnetic flux.






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






27. 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.






28. The output that is produced when one or more inputs are present.






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






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






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






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






33. A three terminal semiconductor device. In a 'FET' the current is from source to drain because a conducting channel is formed by a voltage field between the gate and the source.






34. Radio Frequency Interference.






35. Normally Open.






36. Symbol for Mega - one million.






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






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






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






40. 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.






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






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






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






44. 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.






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






46. Variable Frequency.






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






48. Kw; One thousand watts.






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






50. (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'