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85 Cards in this Set
- Front
- Back
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Stone Age
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1,000,000 - 3,000 BC
Tools for cutting and hunting |
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Bronze Age
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3,000 - 1,200 BC
Combine copper with other metals to make a stronger metal. Bronze tools. |
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Iron Age
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1,200 BC - 1,300 AD
Iron and Steel windmills, armor, plows, spinning wheel |
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Middle Ages
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500 -1500 AD
Romans conquered by Germanic - Gutenberg invented printing press |
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Renaissance
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1300 - 1600 AD
Divnci - Telescope, improved ships, calculating machines |
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Agriculture Age
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1600 - 1700s
used previous inventions - plow, aqueducts.... |
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Industrial Revolution
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1750 AD
Machines, steam engine, airplane, auto, cotton gin, factories, |
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Hydraulics
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Liquid power
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Pneumatics
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Air or gas pressure power
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Ceramics
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inorganic, non-metallic materials heated at high temps
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Manufacturing - 5 steps
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Cutting, forming, conditioning, assembling, finishing.
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Six simple machines
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inclined plane, lever, pulley, wedge, screw, wheel & axel
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Formula for WORK
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Force X Distance
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Mechanical energy system
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change object's motion by a force acting upon it
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Fluid energy system
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air, steam water, oil or gas is moved
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Electrical energy system
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electrons move through wires
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Thermal energy system
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Heat flows from one place to anotehr cooler place
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Newton's 1st Law of Motion
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object at rest stays at rest
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Newton's 2nd Law
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F=MA (Force equals mass X accelleration)
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Newton's 3rd Law
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For every action there is an eqaul and opposite reaction
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Pascal's Law
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Fluid is transmitted equlaly in all directions
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Bernoulli's Principle
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higher speed of fluid = lower pressure.
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Venturi's Principle
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Restriction causes increase in speed
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Boyle's Law
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compress gas 1/2 its volum and double the pressure
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Ampere
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the unit of electrical current
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Watt
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unit of power
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Current
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rate of change flow in a conductor
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Volt
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unit of measure of electrical potential difference.
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Empennage of the plane
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Tail
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Fuselage
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Body
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Airplane - ROLL
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Turn plane around longitudinal axis.
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Airplane - PITCH
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rotation of the nose of the airplane upward or downward on the lateral axis
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Airplane - YAW
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Rotation around a vertical axis, controlled by the rudder of the plane.
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Bridges - abutments
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Supports the ends of the bridge
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Girder
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Large beam on a bridge
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Truss
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rigid framework of wooden or steel beams used for support
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Suspension Bridge
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Spans 70-1000M, good for long spans, golden gate and brooklyn bridges
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Girder Bridge
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Beam bridge - oldest type, simple plank, 10 - 200 M
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Cable-stayed Bridge
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like a girder but with tent-like towers with cables that stretch down diagonally Sunshine Skyway in FL
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Truss Bridge
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40-500m, triangles used in trusses because they are the strongest shape
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Arch Bridge
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40-150m,
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Orthographic projection
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flat, 2-dimensional drawing.
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Oblique View
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3-dimensional view of an object
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Axonometric View
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Drawn on point using 45 degree angles. not common view
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Isometric view
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object stands on a front corner at 30 degree angles.
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Perspective view
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drawn the way the eye tends to see things.
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Stereo Lithography Process
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3-D model of an object in a CAD program
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Rayographs
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in pohotography - these are the shadows of objects cast on the photographic paper
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Paul Gottlieb Nipkow
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German engineer who invetned the Nipkow disk - 1884 - used in early television
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Karl Braun
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German, 1897, invented the cathode ray tub (CRT) led to electronic tv.
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David Sarnoff
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1939 introduced TV at the World's Fair in NYC. (RCA corp manager)
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Cable TV
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CATV - introduced in 1940s.
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Color TV use Phosphors
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when exposed to radiation, they emit visible light. leading to first color tv in 1950s
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Pascal invented?
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adding machine in 1645
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Babbage invented?
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First calculator in 1800s
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Hollerith invented?
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first tabluating machine that would become IBM 1911
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ENIAC - first computer -
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developed by US Army during WWII
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Difference between analog and ditital
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analog through continuous amplitude or waveform. Digital is through non-continues - discrete time sequence
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Transmitter
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changes information source data through modulation
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Receiver
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signal is reproduced performing hte inverse of the operation side so it can be retrieved.
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5 Modules in Communication System
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1. Information Source, 2. Transmitter, 3. Channel, 4. Receiver, 5. Destination
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Engine Lathe
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As one single point cutting tool - used for making sample work.
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Tool room lathe
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smaller type of engine lathe
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Turret lathe
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semi-automatic tools perform several operations at once
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CNC lathes
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controlled through computer
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Automatic screw machines
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multiple spindles
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swiss-type automatic screw machines
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for very precise cutting
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Metal casting
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liquid is used for filling
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Sand Casting
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MOLD - cope and drag
SPRUES - openings or holes |
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Forging
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metal is deformed by pressing, rolling, or deforming it with a hammer
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Sintering
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Fuse the metal parts together - results in strength and density. Inert gas used to avoid oxidation
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Coining
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Increase final density by recompressing
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Thermoplastics
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can be soften when heat applied
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Thermoset Plastics
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set once they are made and will not change with heat
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Abrasive jet machining
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For etching
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Lowery model
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shows relationships between transportation and land use. 1964 - used for Urban Planning
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First Road System
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Mesopotamia in 3000 BC
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Asphalt
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625 BC in Babylon
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First paved road system
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Romans 300 BC
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Biomass
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organic material which stores sunlight in the form of chemical energy
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Fusion
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ligh elements
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Fission
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Heavy elements
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Ohm's Law
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Used in electronics to find missing value in a curcuit
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Multimeters
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used to meausre current and voltage
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750 Watts =
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1 horsepower
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