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34 Cards in this Set

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