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






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






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






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






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






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






7. Pounds per square inch differential. The difference in pressure between two points.






8. Symbol used to denote transformer.






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






10. 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.






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






12. Also known as Hertz - it is the number of complete cycles of periodic waveform that occur during a time period of one second.






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






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






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






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






17. The range of temperature over which a device may be safely used. The temperature range which the device has been designed to operate.






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






19. Mm; One thousandth of a meter.






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






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






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






23. Symbol used to denote transmitter.






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






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






26. NFPA;






27. 'British Thermal Unit' - the amount of thermal energy required to raise one pound of water 1degree F. One BTU is equal to .293 watt hours. One kWh is equal to 3412 BTUs.






28. 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.






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






30. IEEE;






31. 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.






32. The unit of power. One watt equals one joule per second - 1/746th horsepower.






33. A variable resistor.






34. ISO;






35. 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.






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






37. The rate of transfer of energy.






38. 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.'






39. The time it takes for a controller to complete one on/off cycle.






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






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






42. Silicone Controlled Rectifier.






43. The mechanism of a switch which operates the contacts.






44. Or Hertz; The measurement of the time period of one alternating electric current. In the United States this is commonly 60 cycles per second - or 60 Hertz.






45. Variable Frequency.






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






47. A switch with contacts that are made with actuating force and released when that force is removed.






48. The opposition to electrical flow.






49. kV; One thousand volts.






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