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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. 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.






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






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






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






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






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






7. Volt-ohm Meter.






8. The delayed period of time when outputs are turned off when power is initially applied.






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






10. ANSI;






11. The rate of transfer of energy.






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






13. Also known as Hertz - it is the number of complete cycles of periodic waveform that occur during a time period of one second.






14. The current that is gained by a transistor when it is connected in a common emitter circuit.






15. One millionth of an amp.






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






17. Inspection - analysis and action required to ensure quality of output.






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






19. 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






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






21. IBEW;






22. IEEE;






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






24. RMS; AC voltage that equals DC voltage that will do the same amount of work. For an AC sine wave it is 0.707 x peak voltage.






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






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






27. An area in which combustible or flammable mixtures are or could be present.






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






29. Chemical changes and energy produced by electric currents.






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






31. A variable resistor.






32. 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.






33. Radio Frequency Interference.






34. See; 'Maximum Power Rating'.






35. The interaction of magnetism and electrical current.






36. Silicone Controlled Rectifier.






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. Normally Closed.






39. NFPA;






40. See; 'Proximity Sensor'.






41. Variable Frequency.






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






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






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






45. One millionth of a meter.






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






47. 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.






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






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






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