Tech 8 Test

Created by Sivanmehta 

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46 terms · Terms for Tech 8 Test

Technology

The use of tools, materials, and knowledge to solve problems

Tool

Device used to solve a task

Material

Something which is used to make something

Properties of Metals

Weight, Strength, Hardness, Conductivity, Ductile, Malleable, Luster, Cost

Weight

How heavy a metal is

Strength

How strong a metal is

Hardness

Resistance to pressure

Conductivity

Can electricity flow through it or not

Ductile

Can it be stretched without breaking

Malleable

Can the metal be shaped by hammering or rolling

Luster

Shine to a material

Cost

Value of a metal

Metallurgy

The Science and Technology of metals

Alloy

mixture of two or more metals

tarnishing

darkening and color changing of nonferrous metals

rusting

flaking process which can weaken ferrous metals

Three forms of metal

sheet metal, bar stock, and wire

Mechanical Fastening

Using bolts and screw to hold things together

Chemical Fastening

Using chemicals to hold metal together

Welding

Used for ferrous metals

Two types of Soldering

Soft Soldering, Hard Soldering

Soft Soldering

low heat, uses soldering iron and is used for electrical work

Hard soldering

High heat, uses blow torch and snippets

Chemical Symbol for Aluminum

Al

Chemical Symbol for Iron

Fe

Chemical Symbol for Copper

Cu

Chemical Symbol for Chromium

Cr

Chemical Symbol for Lead

Pb

Chemical Symbol for Tin

Sn

Chemical Symbol for Platinum

Pt

Chemical Symbol for Gold

Au

Chemical Symbol for Silver

Ag

Jewelers saw

Saw used to make precise cuts in metal

Bench Pin

Wooden block used with jewelers saw

Rawhide Mallet

Hammer made of tightly wound hide

metal file

file used to make smooth edges

needle file

smaller version of metal file

center punch

makes dents in metal

silicon carbide paper

used for smoothing surfaces and removing burr

buffing compound

red material used for buffing

acetylene torch

blowtorch used for hard soldering

flux

sticky liquid used with snippets

jump rings

rings used to attach necklaces/key-tags

concave surface

curve on inside of metal

convex surface

curve on outside of metal

burr

sharp edges made form drilling and filing

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