Options Exam Flashcards
What are the properties of ash wood?
Tough and flexible, widegrain
What are the uses of ash wood
Sports equipment, ladders
What are the properties of beech wood?
Hard, strong, close grain, prone to warping and splitting
What is beech wood used for?
Furniture, workshop tool handles, children’s toys
What are the properties of mahogany wood?
Strong, durable, available in wide planks, fairly easy to work with but can have an interlocking grain
What are the uses of mahogany wood?
Furniture, veneers
What are the properties of oak wood?
Hard, tough, durable, open grain, can be finished to a high standard
What are the uses of oak wood?
Timber framed buildings, high quality furniture, flooring
What are the properties of balsa wood?
Strong, durable, light weight, easy to work
What are the uses of balsa wood?
Model making, floats and rafts
What are the properties of larch wood?
Reddish in color has a striking grain pattern, tough but easy to work, although resinous and prone to splitting, naturally resistant to rot
What are the uses of larch wood?
Fencing, fence posts, cladding and decking
What are the properties of pine wood?
Straight grained, light yellow in colour soft and easy to work, can be knotty
What are the uses of pine wood?
Interior joinery, furniture, window frames
What are the properties of spruce wood?
Creamy white in color easy to work with small knots, lightweight with good resonant properties (does not distort musical tone)
What are the uses of spruce wood?
Bedroom furniture, stringed musical instruments
What are advantages of manufactured boards?
Available in much larger sheets than solid timber
More stable than natural timbers ( less likely to warp or twist )
Can be made of lower grade timbers
( environmental benefit )
Can be faced with veneer or laminate to improve looks
Good compressive strength ( NOT JUST STRONG)
What movement was Raymond Templier?
Art deco
What movement was Gerrit Rietveld?
De Stiji
What movement was Marcel Breuer?
Bauhaus
What movement was Ettore Sottsass?
Memphis
Explain what is linear motion
Movement in straight line
What is an example of a product using only linear motion
Paper trimmer
Explain what Reciprocating motion is
Movement backwards and forwards in a straight line
What is an example of a product using only reciprocating motion?
Sowing machine needle
Explain what rotary motion is
Movement round in a circle
What is an example of a product that uses only rotary motion?
Wheel on a car
Explain what oscillating motion is
Motion swinging from side to side
What is an example of a product that only uses oscillating motion?
A pendulum in a clock
Explain a first order lever
Fulcrum is between the effort and the load if the fulcrum is moved closer to the load then less effort is required to move the load, although the load does not move as far.
Explain a second order lever
The load and effort are on the same side of the fulcrum. The load is nearer the fulcrum so less effort is required to move the load
Explain a third order lever
Has the load and the effort on the same side as the fulcrum. the load is far from the fulcrum
Explain a simple linkage and a product that uses it
Direction of motion is reversed but magnitude of forces are equal as the distances from the pivot are equal.
These are often used on clothing horses
Explain a bell crank linkage and a product it’s used in
In a bell crank linkage the direction of motion is turned through 90 degrees but the magnitude of the output force is greater than the input force. Amount of output force can be changed by moving fixed pivot used in bicycle brakes
Explain a parallel motion linkage and a product it’s used in
Often referred to as push pull linkage the direction of forces and the magnitude of forces are the same but are used when the force cannot be transferred directly in a straight line often used in the expanding tool boxes
Name the three parts of a cam mechanism
Cam, slide and follower
Name three different types of cams
Egg shaped, eccentric, snail
What is a gear train?
A gear train is a mechanism for transmitting rotary motion and torque
What is a simple gear train?
In a simple gear train the drive gear causes the driven gear to turn in the opposite direction
What do pulley systems do?
Pulley systems transmit rotary motion to rotary motion in machines
