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






2. One millionth of a volt.






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






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






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






6. A full-wave rectifier where the diodes are connected in a bridge circuit. This allows the current to the load during both the positive and negative alternating of the supply voltage.






7. 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.






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






9. A process that is kept at a constant temperature.






10. 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






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






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






13. The power of one watt operating for one hour - and equal to 3 -600 joules.






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






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






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






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






18. One millionth of a meter.






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






20. The voltage that is applied across a semiconductor junction to permit forward current through that junction and the device. Forward voltage is also known as 'bias.'






21. Protective circuitry to guard against spikes that might be induced on the supply line.






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






23. 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.






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. 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






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






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






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






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






30. ISA;






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






32. Normally Open.






33. 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.






34. A fundamental negatively (-) charged atomic particle that rotates around a positively (+) charged nucleus of the atom.






35. The electrical demand of a process. Load can be expressed or calculated as amps (current) - ohms (resistance) or watts (power).






36. A small current leaking from an output device in the off state caused by semiconductor characteristics.






37. An arrangement of any of various conductors through which electric current can flow from a supply current.






38. An interconnected arrangement of parts for carrying high-voltage electricity.






39. IEC;






40. An anode (+) or cathode (-) conductor on a device through which an electric current passes.






41. Kva; One thousand volt amps.






42. A circuit which may have one or many resistors and/or other various devices connected in a series so that the current has only one path to follow.






43. Electric current passing through an electrolyte which produces chemical changes in it.






44. An electrical circuit that is not 'made'. Contacts - switches or similar devices are open and preventing the floe of current.






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






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






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






49. ISO;






50. IBEW;