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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. (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'






2. A device having two terminals and has a low resistance to electrical current in one direction and a high resistance in the other direction.






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






4. The average temperature of a process.






5. -459.67






6. 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.






7. Variable Frequency.






8. CSA ~LINK~






9. Mm; One thousandth of a meter.






10. Ultra High Frequency






11. The interaction of magnetism and electrical current.






12. Silicone Controlled Rectifier.






13. IEEE;






14. A tube - pipe or trough that carries and protects electric wiring.






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






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






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






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






19. 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.






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






21. kV; One thousand volts.






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






23. 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.






24. 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






25. One millionth of an amp.






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






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






28. 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.'






29. Normally Open.






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






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






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






33. 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.






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






35. The opposition to electrical flow.






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






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






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






39. An electrical resistor composed of semiconductor material - whose resistance is a known rapidly varying function of temperature.






40. ISA;






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






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






43. 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






44. Kva; One thousand volt amps.






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






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






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






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






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






50. Very High Frequency.