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. IBEW;






2. 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.






3. Very High Frequency.






4. One millionth of a volt.






5. The opposition to electrical flow.






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






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






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






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






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






12. NEMA;






13. 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.






14. 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.






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






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






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






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






19. Pressure that is less than atmospheric pressure.






20. The standard that is used to make comparison measurements or calibrations.






21. ISA;






22. 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.






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






24. IEC;






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






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






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






28. Intensity. The commonly used symbol used to represent Amperes when used in formulas. I = Intensity = Current = Amps = Amperes.






29. In a temperature controller it is the output form that provides a current proportional to the amount of control that is required. Commonly it is the 4 to 20 milliamp current proportioning band that is used in the electronics industry.






30. 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.






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






32. Kva; One thousand volt amps.






33. The act of the opening of an electrical circuit.






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






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






36. Ultra High Frequency






37. A variable resistor.






38. In a three phase connection all three phases are connected in series thus forming a closed circuit.






39. Kw; One thousand watts.






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






41. Symbol used to denote transmitter.






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






43. A hypothetical basic subatomic nuclear particle believed to be the basic component of protons - neutrons - etc.






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






45. 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.






46. 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.






47. 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.






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






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






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