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 variable resistor.






2. The average temperature of a process.






3. 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.






4. A meter used to measure units of volts.






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






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






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






8. 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.






9. A device that converts AC voltage to pulsating DC voltage.






10. A region of space that surrounds a moving electrical charge or a magnetic pole - in which the electrical charge or magnetic pole experiences a force that is above the electrostatic ones associated with particles at rest.






11. The pronounced curvature in reverse voltage current that is characteristic of a diode.






12. A highly accurate bridge configuration that is used to measure three-wire RTD thermometers.






13. Symbol for Mega - one million.






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






15. Response to the change in the level of the input signal.






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






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






18. Ultra High Frequency






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






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






21. Mm; One thousandth of a meter.






22. An electromagnetic radiation produced when the inner satellite electrons of heavy atoms have been excited by collision with a stream of fast electrons return to their ground state - giving up the energy previously imparted to them.






23. FM; ~LINK~






24. OSHA;






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






26. The amount of heat needed to convert one pound of water to one pound of steam. Latent heat is expressed in BTU per pound.






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






28. Volt-ohm Meter.






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






30. '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.






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






32. Resistance Temperature Detector.






33. 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.






34. 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.






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






36. 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.






37. Kw; One thousand watts.






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






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






40. ISA;






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






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






43. A silicone semiconductor that maintains a fixed voltage in a circuit.






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






45. Kwh; One thousand watt-hours.






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






47. ANSI;






48. Non-conducting material used to isolate and/or insulate energized electrical components.






49. 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.






50. Kva; One thousand volt amps.