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






2. A material used to conduct electricity or heat.






3. 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.






4. '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.






5. UL; ~LINK~






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






7. Radio Frequency Interference.






8. The difference in potential measured between two points caused by resistance or impedance.






9. A hypothetical nuclear of a quark plus an antiproton.






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






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






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






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






14. Commonly used in generators and motors - it is an electromagnet formed from a coil of insulated wire that is wound around a soft iron core.






15. A connected path to earth or to a conductive body that has a reference potential to earth.






16. 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.






17. The rate at which electricity flows - measured in amperes - 1 ampere = 1 coulomb per second.






18. The increase of the power level - current or voltage of a signal. In an amplifier it is the ratio of the output to the input signal levels.






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






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






21. Very High Frequency.






22. Magnetically - opposite poles - north and south. In electricity - oppositely charged poles - positive and negative.






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






24. A meter used to measure units of volts.






25. The interaction of magnetism and electrical current.






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






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






28. 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.






29. The basic of thermal energy. The work done by the force of one newton acting through a distance of one meter.






30. The unit by which electrical resistance is measured. One ohm is equal to the current of one ampere which will flow when a voltage of one volt is applied






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






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






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






34. NEMA;






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






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






37. A Solid State relay is a switching device that completes or interrupts a circuit electrically and has no moving parts. A Mechanical relay is an electromechanical device that closes contacts to complete a circuit or opens contacts to interrupt a circu






38. ANSI;






39. 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.






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






41. The average temperature of a process.






42. Applying molecular physics to electronics.






43. Kwh; One thousand watt-hours.






44. Silicone Controlled Rectifier.






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






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






47. One millionth of an amp.






48. One millionth of a volt.






49. IEEE;






50. A variable resistor.