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. 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.






2. Kw; One thousand watts.






3. A coil of wire wound about a magnetic material - such as iron - that produces a magnetic field when current flows through the wire.






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






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






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






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






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






9. The quality of having the ability to emit light when struck by electrons or another form of radiation.






10. The average temperature of a process.






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






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






13. A panel meter with zero and span adjustments - commonly scaled for signals such as 1-5 volts - 4-20mA - etc.






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






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






16. The form of radiation used to make non-contact temperature measurements. In the electromagnetic spectrum it is the area beyond red light from 760 nanometers to 1000 microns.






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






18. Kva; One thousand volt amps.






19. A three terminal semiconductor device. In a 'FET' the current is from source to drain because a conducting channel is formed by a voltage field between the gate and the source.






20. CSA ~LINK~






21. The maximum temperature at which a device can be safely operated.






22. 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.






23. Symbol used for wye configuration for three phase electrical connections.






24. Mm; One thousandth of a meter.






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






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






27. 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.






28. 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.






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






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






31. The amount of power that is consumed and converted to heat.






32. kV; One thousand volts.






33. The time delay between the output signal and the response time of the receiver of the signal.






34. The range of voltage needed to maintain operation of a control or device.






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






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






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






38. EPA; ~LINK~






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






40. 'Common Mode Voltage.' The voltage which is tolerable between signal and ground.






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






42. SI; The standard metric system of units.






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






45. The opposition to electrical flow.






46. NEMA;






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






48. ISO;






49. IEEE;






50. A reference point at zero potential with respect to the earth. In an electronic circuit it is the common return path for electric current. A conducting connection between the earth and an electrical circuit or electrical equipment. Also - the negativ