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WorksheetsEnd of Module Year 8
Total questions: 25
Worksheet time: 25mins
A CAM changes the input motion, which is usually rotary motion (a rotating motion), to a reciprocating motion of the follower.
True
False
How many parts does a CAM mechanism have?
One
Four
Three
Two
CAMS are made from?
Wood and plastic only
Plastic and metal only
Wood, plastic and metal
wood and metal only
List the three parts of a cam mechanism:
(a)
The ______________ is a rod that rests on the edge of the turning cam.
follower
Shaft
Cam
Cam Toy
In relation to CAMS, the follower is responsible for what three things:
Side to side movement (swing)
Fall (move down) or
Dwell (remain stationary)
Rise (move up)
Rotation (360 degrees) or
Dwell (remain stationary)
Rise (move up)
Fall (move down) or
Dwell (remain stationary)
Rise (move up)
Fall (move down) or
Push/Pull (in or out movement)
In relation to CAMS what is a cycle?
The shifting of the cam from one point to another random point
The clockwise movement of the cam
A 180 degree movement of the CAM
One rotation/revolution of the cam.
In relation to CAMs what is the DWELL?
When there is no movement of any part of the CAM
When the cam rotates but the follower does not rise or fall.
When the follower rotates but the cam does not rise or fall.
The part of the CAM the sits on the edge of the follower
What is the name of the CAM shown
Pear CAM
Drop Cam
Circular Cam
Eccentric Cam
Name the Cam shown below?
Pear Cam
Drop Cam
Circular Cam
Eccentric Cams
In relation to timber conversion what is FELLING?
The cutting down of the trees
The cutting up of the trees of commercial use
The cutting of the branches of the trees
The process of cutting up of the trees into small pieces.
What is the name of this naturally occurring wood defect?
Resin Pocket
Live Knot
Heart Shake
Dead Knot
What is the difference between a live knot and a dead knot?
The fibres of the dead knot aren't connected to the wood
The knot is still growing
The fibres of the dead knot are connected to the wood
All of the above
What creates knots in wood?
Poor stacking of timber during seasoning
Direct sunlight during seasoning
Animals nesting in trees
The growth of branches as the tree grows
WHAT IS THE CAUSE OF ALL THESE DEFECTS?
POOR FELLING TECHNIQUES
WEATHER DAMAGE
POOR TRANSPORTATION TECHNIQUES
POOR SEASONING TECHNIQUES
WHICH OF THESE STACKING DEFECTS IS BOWING?
A
B
C
D
WHICH OF THESE STACKING DEFECTS IS TWISTING?
A
B
C
D
What is the name of this form of defect?
Cupping
Heart Shake
Honeycombing
Cup Shake
What is the cause of this form of defect?
Growth and felling stresses
Poor Seasoning
Rapid Dry
Frost
The defects that usually occur in the timber may be classified into two categories
True
False
What is the standard size of man made wood?
2000mm by 1220mm (6 feet by 4 feet)
2440mm by 1000mm (8 feet by 3 feet)
2000mm by 1000 mm (6 feet by 3 feet)
2440mm by 1220mm (8 feet by 4 feet)
Two advantages of man made wood are (a)
Which of the following man made wood is built up with a core of softwood strips bonded together with adhesive and covered with a sheet of plywood on either side.
Chipboard
Plywood
Blockboard
Medium Density Fiber
This type of man made wood is made from veneers (plies) of timber with each grain layer being at right angles to each other and bonded together by resin and pressure.
Plywood
Chipboard
Medium density fibre board
Heartwood
Plywood can be used to make design and technology projects
True
False
