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DT > Options Exam > Flashcards

Options Exam Flashcards

1
Q

What are the properties of ash wood?

A

Tough and flexible, widegrain

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2
Q

What are the uses of ash wood

A

Sports equipment, ladders

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3
Q

What are the properties of beech wood?

A

Hard, strong, close grain, prone to warping and splitting

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4
Q

What is beech wood used for?

A

Furniture, workshop tool handles, children’s toys

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5
Q

What are the properties of mahogany wood?

A

Strong, durable, available in wide planks, fairly easy to work with but can have an interlocking grain

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6
Q

What are the uses of mahogany wood?

A

Furniture, veneers

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7
Q

What are the properties of oak wood?

A

Hard, tough, durable, open grain, can be finished to a high standard

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8
Q

What are the uses of oak wood?

A

Timber framed buildings, high quality furniture, flooring

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9
Q

What are the properties of balsa wood?

A

Strong, durable, light weight, easy to work

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10
Q

What are the uses of balsa wood?

A

Model making, floats and rafts

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11
Q

What are the properties of larch wood?

A

Reddish in color has a striking grain pattern, tough but easy to work, although resinous and prone to splitting, naturally resistant to rot

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12
Q

What are the uses of larch wood?

A

Fencing, fence posts, cladding and decking

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13
Q

What are the properties of pine wood?

A

Straight grained, light yellow in colour soft and easy to work, can be knotty

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14
Q

What are the uses of pine wood?

A

Interior joinery, furniture, window frames

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15
Q

What are the properties of spruce wood?

A

Creamy white in color easy to work with small knots, lightweight with good resonant properties (does not distort musical tone)

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16
Q

What are the uses of spruce wood?

A

Bedroom furniture, stringed musical instruments

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17
Q

What are advantages of manufactured boards?

A

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)

18
Q

What movement was Raymond Templier?

A

Art deco

19
Q

What movement was Gerrit Rietveld?

A

De Stiji

20
Q

What movement was Marcel Breuer?

A

Bauhaus

21
Q

What movement was Ettore Sottsass?

A

Memphis

22
Q

Explain what is linear motion

A

Movement in straight line

23
Q

What is an example of a product using only linear motion

A

Paper trimmer

24
Q

Explain what Reciprocating motion is

A

Movement backwards and forwards in a straight line

25
Q

What is an example of a product using only reciprocating motion?

A

Sowing machine needle

26
Q

Explain what rotary motion is

A

Movement round in a circle

27
Q

What is an example of a product that uses only rotary motion?

A

Wheel on a car

28
Q

Explain what oscillating motion is

A

Motion swinging from side to side

29
Q

What is an example of a product that only uses oscillating motion?

A

A pendulum in a clock

30
Q

Explain a first order lever

A

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.

31
Q

Explain a second order lever

A

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

32
Q

Explain a third order lever

A

Has the load and the effort on the same side as the fulcrum. the load is far from the fulcrum

33
Q

Explain a simple linkage and a product that uses it

A

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

34
Q

Explain a bell crank linkage and a product it’s used in

A

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

35
Q

Explain a parallel motion linkage and a product it’s used in

A

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

36
Q

Name the three parts of a cam mechanism

A

Cam, slide and follower

37
Q

Name three different types of cams

A

Egg shaped, eccentric, snail

38
Q

What is a gear train?

A

A gear train is a mechanism for transmitting rotary motion and torque

39
Q

What is a simple gear train?

A

In a simple gear train the drive gear causes the driven gear to turn in the opposite direction

40
Q

What do pulley systems do?

A

Pulley systems transmit rotary motion to rotary motion in machines

DT (1 decks)

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