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Advanced Vocabulary for TOEFL - Engineering and Electronics

Here you will learn some English words about engineering and electronics, such as "transistor", "electrode", "voltage", etc. that are needed for the TOEFL exam.

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Advanced Words Needed for TOEFL

a field of study that deals with the building, designing, developing, etc. of structures, bridges, or machines

Ex: Engineering requires strong skills in mathematics and physics .
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the branch of physics and electrical engineering that focuses on designing circuits that use transistors and microchips

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a small semiconductor device, used in television and radio sets, able to amplify or rectify an electric current

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a solid substance that conducts electricity or heat better than insulators, but not as well as most metals

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dc
[noun]

an electric current that flows only in one direction

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a thin board on which the circuits are printed

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a failure in a circuit caused when the electricity flows in the wrong route due to wire damage or fault in the connections of wires

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electrode
[noun]

a conductor through which electricity travels to or from an object, such as batteries

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voltage
[noun]

total potential energy provided by a power source

Ex: Industrial machines require 480V to operate.
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an electric device that is used to increase or decrease the voltage of an alternating current

Ex: The transformer converts alternating current ( AC ) from one voltage level to another , making it a key component in the power grid .
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a piece of electronic equipment used for sending electromagnetic waves carrying radio or television signals

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capacitor
[noun]

an electric device that is used to accumulate electric charge

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to allow heat or electricity be transmitted

Ex: Certain ceramics are engineered to conduct electricity for use in electronics .
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to screw
[Verb]

to firmly attach or tighten something using a turning metal fastener

Ex: To hang the painting securely , he screwed the picture hook into the wall stud .
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bolt
[noun]

a piece of metal like a thick nail without a point that used to secure assembled parts by passing through holes and tightening with a nut

Ex: The mechanic replaced the rusted bolt with a new one .
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nut
[noun]

a flat piece of metal with a hole in the middle through which a bolt is put to secure or fasten objects together

Ex: The engineer specified stainless steel nuts and bolts for the outdoor furniture to prevent rusting.
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cog
[noun]

a wheel with a set of square or triangular teeth sticking out around the edge that fits into the edge of a similar wheel, causing both wheels to turn

Ex: A computer simulation helped engineers optimize the design of the cog to maximize its strength and durability under different loads .
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diode
[noun]

an electronic device with two terminals, typically allowing the flow of current in one direction only

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fuse
[noun]

an electrical device that is used to stop or control the flow of current in a circuit in case it is too strong

Ex: Modern homes often use circuit breakers instead of fuses.
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generator
[noun]

a machine that produces electricity by converting mechanical energy into electrical energy

Ex: Portable generators are useful during camping trips or emergencies to provide temporary electrical power .
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crank
[noun]

a device that allows movement between mechanical parts of a machine or converts backward and forward motion into circular movement

Ex: The crankshaft is a critical component in internal combustion engines, converting linear piston motion into rotational motion to drive the vehicle.
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shaft
[noun]

a metal bar in an engine that enables movement and power to be transmitted from one part to another

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an instrument that automatically controls the temperature of a room, machine, etc.

Ex: Installing a digital thermostat can help reduce heating and cooling costs by providing more accurate temperature control .
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a device that allows steam, liquid, etc. to escape a machine, if the pressure inside the machine becomes too high

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robotics
[noun]

an area of technology that is concerned with the study or use of robots

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relay
[noun]

an electronic device that uses a small electrical current to control a larger current, acting like an automatic switch

Ex: Troubleshooting the malfunctioning relay revealed a burnt coil , which was quickly replaced to restore the system 's functionality .
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a piece of equipment for generating oscillating electric currents or voltages by non-mechanical means

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insulator
[noun]

a substance that doesn't conduct heat, sound, etc.

Ex: Ceramic materials are often used as insulators in high-voltage equipment .
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a device that converts the energy of the sun into electricity

Ex: Installing solar cells on rooftops can reduce dependence on fossil fuels and lower electricity bills .
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rotor
[noun]

the rotating part of a machine that revolves around a stationary part

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to rewire
[Verb]

to replace or install new electrical wiring in something, like a building or a machine

Ex: The mechanic had to rewire parts of the car to fix the electrical issue .
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an electric current that reverses direction periodically, typically used in power distribution systems due to its efficiency in long-distance transmission

Ex: The voltage of alternating current can be easily transformed using transformers for different applications .
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Advanced Vocabulary for TOEFL
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