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34 Cards in this Set
- Front
- Back
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technology
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the use of tools, materials, and knowledge to solve problems
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electricity
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moving electrons
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practical circuit
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a collection of devices working together to let us use electricity safely and efficiently
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parts of a circuit
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load, control, source, complete conductor path, protection
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circuit problems
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open circuit: conductor path not complete (open switch)
short circuit: electricty flows through circuit w/o going through load (loose hot wire touching the neutral) |
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volt
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pressure
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amp
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rate of flow
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ohm
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resistance
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series circuit
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one path for electricity to flow
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parallel circuit
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more than one path for electricity to flow
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combination circuit
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has both series and parallel circuits
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insulator
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difficult but not impossible for electricity to flow through (glass, plastic)
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conductor
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easy for electricity to flow through (copper, gold, steel)
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Type NM
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type nonmetallic covering
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14
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wire gage
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2
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2 conductors (black and white)
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W/G
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with ground wire
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color coding: duplex outlet
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-white wire to one side
-black wire to other side |
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color coding: 1 lamp controlled by SPST switch
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-white wire to one side
-black wire to one side -black wire from second side of switch to appliance |
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schematic drawing
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drawing that uses symbols to show electrical components
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fatal current
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current of .01 amps is fatal
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ground fault
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small electrical current that leaks from the ground
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GCFI ground fault circuit interrupter
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protective device that detects ground faults and disconnects the circuit
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solder
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an alloy of tin and lead
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alloy
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combination of two or more metals that has properties different from any of the original metals.
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flux
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chemical that cleans metal so that solder will stick to it
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splice
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mechanical connection between two or more wires
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ohm's law
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mathematical relationship between volts, amps, and ohms in a circuit
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energy (quantity)
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the ability to do work or bring about a change. measured in KWH
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power
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the rate at which work is done or energy is converted from one form to another. measured in watts and horsepower
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drill press
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tool that gives energy to drill bit to make holes
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chip
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material cut and removed by drill bit to create holes. carried out of hole by drill bit's flutes
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peck drilling
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drilling part way and withdrawing the drill bit to clear the chips
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step drilling
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drilling small pilot hole first then expanding the diameter with larger diameter drill bits
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