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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. The opposition to electrical flow.






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






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






4. IEC;






5. 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.






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






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 device incorporating semiconductor material and suitable contacts capable of performing electrical functions (such as voltage - current or power amplification) with low power requirements.






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






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






11. 'British Thermal Unit' - the amount of thermal energy required to raise one pound of water 1degree F. One BTU is equal to .293 watt hours. One kWh is equal to 3412 BTUs.






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






13. 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.






14. European environmental ratings. Similar to NEMA ratings in the USA. IP;*site has NEMA comparisons ~LINK~






15. 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.






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






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






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






19. A negative (-) electrode. The point of entry of electrons into a device from an external circuit. The negative electrode of a semiconductor diode.






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






21. 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.'






22. A variable resistor.






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






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






25. Symbol used to denote transmitter.






26. 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.






27. The standard unit of magnetic flux.






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






29. 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.






30. ISO;






31. MLS; A photoelectric control that operates on pulsed infrared radiation at a specific frequency - and responds only to that frequency of pulse. MLS is used frequently in areas where ambient light may cause problems with other types of sensors.






32. OSHA;






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






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






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






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






37. Symbol for Mega - one million.






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






39. A switch in a controller that manually resets after exceeding the controllers limit.






40. ANSI;






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






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






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






44. 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.






45. 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






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






47. (DC); Electrical current that flows consistently in one direction only.






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






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






50. Normally Open.







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