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






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






4. (ampere)The basic unit of current in an electrical circuit. One ampere is the rate of flow of electric current when one coulomb of charge flows past a point in the circuit in one second. Symbolically characterized by the letter 'I' and sometimes 'A'






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






6. A material used to conduct electricity or heat.






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






8. Ultra High Frequency






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






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






11. 'American Wire Gauge' system used to determine wire size.






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






13. The element inside a vacuum tube - incandescent lamp or other similar device.






14. The maximum watts that a device can safely handle.






15. A meter used to measure electrical resistance in units of ohms.






16. 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.






17. 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.






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






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






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






21. NEMA;






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






23. ISA;






24. Pressure that is less than atmospheric pressure.






25. 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.






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






27. Kva; One thousand volt amps.






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






29. Kw; One thousand watts.






30. The resistance to electrical current. Resistance is measured in ohms.






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






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






33. The measured amount of electrical energy that represents the electrostatic forces between atomic particles. The nucleus of an atom has a positive charge (+) and the electrons have a negative charge(-).






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






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






36. 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






37. Two dissimilar metals connected at a point - that produce an electrical current whose magnitude is dependent upon the temperature at the junction point.






38. Output power divided by input power - (work performed in ratio to energy used to produce it).






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






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






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






42. 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.






43. A high-intensity incandescent lamp with a quartz bulb containing an inert gas of iodine or bromine vapor.






44. One of the very small discrete packets into which many forms of energy are subdivided.






45. A solid-state switching device for semiconductors to convert AC current in one of two directions controlled by an electrode.






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






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






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






49. A solid-state switching device used in switching AC wave forms.






50. NEC: A set of regulations pertaining to electrical installation and design in the interest of the protection of life and property. The NEC is adopted by NFPA and approved by ANSI. It is the preferred standard of guidelines used by most electrical reg