Tech Grade 8 Question Preview (ID: 42547)
Tech.
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Define following terms in structural failures - Toppling over
a) No stay wires
b) when a structure is not stable enough to withstand forces from the side
c) base too small
d) all
Explain counter rotation
a) Any two gears that mesh
b) Turn in opposite directions
c) All
d) None
Define Cam
a) It is a mechanism that converts rotary motion
b) Into up and down motion
c) All
d) None
Define Crank
a) It is a mechanism that converts up and down motion
b) Into reciprocating rotary motion
c) All
d) None
List 2 examples of linked second class lever
a) wheelbarrow
b) Bottle opener
c) Nutcracker
d) All
Is it possible for a snail cam to turn in a clockwise direction. Explain your answer
a) Yes
b) No, the follower will jam against the flat side of the cam
c) Maybe
d) Neither
Name 2 properties of plastic
a) Cheap
b) Waterproof
c) Light
d) All
Name 2 plastic products and the impact on the environment
a) Plastic bottles and bags
b) Looks ugly
c) kills animals
d) All
Define Bio-degradeable
a) The ability to burn down objects
b) The ability to break down objects down naturally into simple, harmless substances
c) Kill the environment
d) neither
What is high grade recycling
a) New paper pulp is added
b) No paper pulp is added
c) Nothing
d) Neither
What is low grade recycling
a) Paper pulp added
b) Nothing added
c) No new paper pulp is added to the recycled paper pulp
d) Neither
What is the purpose graphics in technology
a) Development and communication of ideas
b) Innovation
c) Planning ideas
d) Neither
Define two dimensional drawing
a) Drawing only showing 2 views of an object
b) On a flat surface
c) None
d) All
Define Isometric drawing
a) It is a 3 dimensional drawing
b) shows 3 sides
c) place at 30 degress on a horizontal line
d) All
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