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






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






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






4. Electrical energy produced by the action of heat.






5. NFPA;






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






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






8. Symbol used to denote transmitter.






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






10. Kw; One thousand watts.






11. Kwh; One thousand watt-hours.






12. The average temperature of a process.






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






14. The method by which two devices or systems are connected and interact with each other.






15. The interaction of magnetism and electrical current.






16. CSA ~LINK~






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






18. Applying molecular physics to electronics.






19. The form of radiation used to make non-contact temperature measurements. In the electromagnetic spectrum it is the area beyond red light from 760 nanometers to 1000 microns.






20. Symbol used to denote transformer.






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






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






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






24. Pressure that is less than atmospheric pressure.






25. The rate of transfer of energy.






26. Chemical changes and energy produced by electric currents.






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






28. IEC;






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






30. 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.






31. See; 'Maximum Power Rating'.






32. FM; ~LINK~






33. 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.






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






35. A coil of wire wound about a magnetic material - such as iron - that produces a magnetic field when current flows through the wire.






36. The opposition to electrical flow.






37. See; 'Proximity Sensor'.






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






39. (AC); Electrical current that changes (or alternates) in magnitude and direction of the current at regular intervals.






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






41. Very High Frequency.






42. A variable resistor.






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






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






45. MA; One thousandth of an amp.






46. A reference point at zero potential with respect to the earth. In an electronic circuit it is the common return path for electric current. A conducting connection between the earth and an electrical circuit or electrical equipment. Also - the negativ






47. 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.






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






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






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