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 device - instrument or component that will not produce any spark or thermal effects under any conditions that are normal or abnormal that will ignite a specified gas mixture. Electrical and thermal energy limits are at levels incapable of causing i






2. Variable Frequency.






3. MA; One thousandth of an amp.






4. One thousandth of an inch.






5. kV; One thousand volts.






6. Mm; One thousandth of a meter.






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






8. One millionth of a volt.






9. A unit of electric charge. The amount of charge conveyed in one second by one ampere.






10. A three mode control consisting of time Proportioning - Integral and Derivative rate action.






11. The method by which two devices or systems are connected and interact with each other.






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






13. A device used to store electrical energy in an electrostatic field until discharge.






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






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






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






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






18. MV; One thousandth of a volt. The difference in potential needed to cause a current of one milliampere flow through a resistance of one ohm.






19. The unit for capacitance. A capacitor that stored one coulomb of charge with one volt across it will have a value of one farad.






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






21. ISA;






22. An electrically conductive fused salt or a solution where the charge is carried by ionic movement.






23. The rate of transfer of energy.






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






25. NFPA;






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






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






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






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






30. 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.






31. 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.






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






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






34. See; 'Maximum Power Rating'.






35. A unit of electrical current named after French physicist Andr






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






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






38. Kwh; One thousand watt-hours.






39. The opposition to electrical flow.






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






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






42. ANSI;






43. 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.






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






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






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






47. The magnitude and time phase of a quantity - represented by a plotted line.






48. Normally Closed.






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






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