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. One millionth of a volt.






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






3. 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.






4. CSA ~LINK~






5. 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.






6. 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.






7. ISA;






8. Chemical changes and energy produced by electric currents.






9. ANSI;






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






11. Mm; One thousandth of a meter.






12. Normally Closed.






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






14. 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.






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






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






17. Very High Frequency.






18. The opposition to electrical flow.






19. The interaction of magnetism and electrical current.






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






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






22. The modification of a signal that causes the output to remain energized until it is released by intent.






23. A meter used to measure units of volts.






24. Protective circuitry to guard against spikes that might be induced on the supply line.






25. To close an electrical circuit. To establish an electrical circuit through the closing of a contact - switch or other related device.






26. 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.






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






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






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






30. 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






31. NFPA;






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






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






34. IEC;






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






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






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






38. Pressure that is less than atmospheric pressure.






39. EPA; ~LINK~






40. IBEW;






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






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






43. One millionth of an amp.






44. That part of a circuit which is physically interconnected.






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






46. Kva; One thousand volt amps.






47. A device having two terminals and has a low resistance to electrical current in one direction and a high resistance in the other direction.






48. The amount of energy released in a nuclear reaction. It is expressed in atomic mass units - or in million electron volts (MEV).






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






50. A material used to conduct electricity or heat.