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What are the 3 types of files
What is used to cut curves in wood/plastic?
what is used to cut straight lines in wood?
What is used to cut straight lines in metal/plastic
What are the filing techniques?
What is cross filing used for
removing waste material
what is draw filing used for
to finish a material as it gives a smoother cut
What is a chisel used for?
for removing small amounts of waste wood, often between two joints
List the permanent methods of joining
- Soft soldering
- Mig Welding
List 5 adhesives
- Contact adhesive
List semi permanent joining methods
- wood screws
- nuts, washers and bolts
What temperature does solder melt?
around 200 degrees
What is a template used for?
used repetitively to reproduce any number of identical shapes, they are used for all metals
What is a jig used for
to help produce more accurate angles
How would excess metal be removed
give examples of pneumatics in every day life
- Road drills
- Dentist drills
What do the 3 and 2 mean in 3/2 valve
- 3 ports
- 2 positions (on and off)
Name 4 actuators
- Roller trip
- Push button
What is a benefit for AND logic
safety, if a button is accidentally pressed the circuit will not start
What shapes are start and stop boxes
what shapes are statement boxes
what shapes are wait boxes
what shape are decision boxes
LDR in Dark
- High resistance
- Voltage out- 0.7V or above
- Transister- on
- Bulb turns on
LDR in Light
- Low resistance
- Voltage out- less than 0.7
- Transister- off
- Bulb turns off
If the LDR is on the bottom, is it light or dark?
what is the input leg of a transistor?
the base leg
How can you protect a transister?
use a resistor
What is a conductor
a material with a structure that allows electrons to move freely
What is an insulator
a material that doesn't have free electrons as the electrons cannot move
What is a semiconductor
a material that has conductivity somewhere between a conductor and insulator.
How can an LED be protected from excess voltage
a fixed resistor
What is a battery
a cell that converts chemical energy into electrical energy
provides resistance to the flow of electrons
an adjustable resistor used to increase od recrease the amount of resistance to the flow of electrons
come from trees that usually have needle like leaves (coniferous trees)
2 types of softwood
pine and redwood
- slow growing and are more expensive than soft woods
- broad leaf trees and are deciduous
man made board
made from waste materials
generally tend to corrode
non ferrous metals
do not corrode
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