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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 amount of power that is consumed and converted to heat.






2. A form of silicone dioxide. Commonly used in the making of radio transmitters and heat resistant products.






3. SI; The standard metric system of units.






4. Normally Closed.






5. A form of energy produced by the flow of particles of matter and consists of commonly attractive positively (protons [+]) and negatively (electrons [-]) charged atomic particles. A stream of electrons - or an electric current.






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. A device used to store electrical energy in an electrostatic field until discharge.






8. Applying molecular physics to electronics.






9. A fluctuation in the intensity of a steady current.






10. The average temperature of a process.






11. Electrical energy produced by the action of heat.






12. A switch with contacts that are made with actuating force and released when that force is removed.






13. Kwh; One thousand watt-hours.






14. NFPA;






15. -459.67






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






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






18. The rate of transfer of energy.






19. Mm; One thousandth of a meter.






20. 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.






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






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






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






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






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






26. 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.






27. An ionized gas containing about equal numbers of positive and negative charges - which is a good conductor of electricity - and is affected by a magnetic field.






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






29. IBEW;






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






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






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






33. NEMA;






34. The time based relationship between a reference and a periodic function.






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






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






37. 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.






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






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






40. A form of control where the power supplied to a process is controlled by limiting the phase angle of the line voltage.






41. Silicone Controlled Rectifier.






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






43. 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






44. A device that converts AC voltage to pulsating DC voltage.






45. A hypothetical nuclear of a quark plus an antiproton.






46. 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






47. Variable Frequency.






48. 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.






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






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