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25 Cards in this Set
- Front
- Back
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Name Five Types of Bridges
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Beam, Suspension, Arch, Truss, and Cantilever
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Name Three Types of Truss's
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Howe, Prat, and Warren
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Contrast Tension and Compression
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Tension Pulls and elongates
Compression squeezes and shortens |
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Describe an orthographic drawing
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2d drawing that shows straight on view front, top, and side
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illustrate sagging and hogging forces (Draw Picture)
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See Diagram 2
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Name three types of joinery
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Adhesive, Interlocking, Mechanical
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List five reasons for bridge failure
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Wind, Overload, Poor Engineering, Faigue, Erosion, Grosian
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Make a diagram of an electrical circuit.
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See Diagram 1
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List six types of simple machines
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Lever, Wheel and Axle, Pulley, Screw, Inclined Plane, Wedge
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State the purose of a simple machine?
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Machines use mechanical advantage to decrease the amount of energy required to accomplish work
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Differentiate between kinetic energy and potental energy? Give an example for each
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Kinetic energy is energy in motion (example: ball rolling)
Potental energy is stored energy waiting to be converted (example: battery in a package) |
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Define Watt
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A unit used to measure use of electricity
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List three safety rules for the band saw
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1. Wear eye protection
2. Adjust guard 3. Keep fingers 3" from blade 4. Make sure blade is tight 5. Keep fingers on top of wood 6. Turn off machine when done |
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List three safety rules for grinding tools
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1. Wear eye protection
2. Keep material flat on surface 3. No pieces smaller than 1" 4. Use vice grips for small material |
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List three safety rules for drilling tools
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1. Wear eye protection
2. Make sure chuck teeth grip bit securely 3. Drill slowly 4. Use vice grips for small and irregular pecies 5. Keep a support piece below |
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Define electricity
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The movment of electrons from one atom to another
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What unit is used to measure the current flow of elecricity?
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Amps
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Exlpain Watts Law and write the formual
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The reationship between volts, watts, and amps
W=VxA |
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Justify the choice of a 10 : 1 gear ratio on a race car
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A higher first number creates more speed
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How would you increase the strength of an electric magnet?
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Add more coils
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Compare the use of a 20mm gear and a 90mm gear used in a 20:90 ratio and a 90:20 ratio
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The 20:90 ratio will create more torque at a lower speed, and lower RPM
The 90:20 ratio will have decreased torque at a higher speed, and higher RPM |
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True or False
When using a lever the load should be closer to the pivot to make the work easier |
True
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Match the resource to the type of machine energy
Fluid Mechanical Air Hydraulic Effort Pneumatic |
Fluid= Hydraulic
Air= Pneumatic Effort= Mechanical |
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Diagram and label the four types of mehanical motion
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Linear, Reciprocal, Oscilating, Rotary
See Diagram 3 |
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Discuss static and current electricty
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Both are kinetic energy in motion. Static has random movment of electrons while current has a steady consistant movment of electrons
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