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 switching device used in switching AC wave forms.






2. The average temperature of a process.






3. FM; ~LINK~






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






5. Normally Open.






6. One millionth of an amp.






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






8. A meter used to measure units of volts.






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






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






11. The rapid on/off cycling of a relay caused by improper signal or adjustment - faulty contacts - or other malfunction.






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






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






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






15. The voltage that is applied across a semiconductor junction to permit forward current through that junction and the device. Forward voltage is also known as 'bias.'






16. The moving of electricity or heat through a conductor.






17. The standard that is used to make comparison measurements or calibrations.






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






19. The speed or time rate of change of displacement.






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






21. Electrical energy produced by the action of heat.






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






23. LED; A solid state light source component that emits light or invisible infrared radiation.






24. A unit of energy in solid-state physics with mass and momentum but that does not exist as a free particle.






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






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






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






28. -459.67






29. One millionth of a meter.






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






31. 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.






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






33. The current that is gained by a transistor when it is connected in a common emitter circuit.






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






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






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






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






38. A switch in a controller that manually resets after exceeding the controllers limit.






39. The measure of the ability of a material or substance to carry electrical current.






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






41. 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.






42. See; 'Maximum Power Rating'.






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






44. See; 'Proximity Sensor'.






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






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






47. Radio Frequency Interference.






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






49. In a temperature controller it is the output form that provides a current proportional to the amount of control that is required. Commonly it is the 4 to 20 milliamp current proportioning band that is used in the electronics industry.






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