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Technology Year 11 > Design, Materials And Manufactoring > Flashcards

Design, Materials And Manufactoring Flashcards

1
Q

What are the 4 safety signs and an example of each one?

A

Hazard signs - toxic
Prohibition signs - do not run
Mandatory signs - wear eye protection
Safe condition signs - first aid

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2
Q

What does tensile strength mean?

A

The resistance if a material

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3
Q

What does compressive strength mean?

A

The resistance of a material to breaking under compression

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4
Q

What does bending strength mean?

A

The ability of a material to resist deformation under load

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5
Q

What does shear strength mean?

A

The ability of a material to resist forces that cause the materials internal structure to slide against ittself

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6
Q

What does torsional strength mean?

A

The ability to withstand a twisting load

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7
Q

What does plasticity mean?

A

The quality of being shaped

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8
Q

What does malleability mean?

A

The ability of being forged

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9
Q

What does ductility mean?

A

To be able to be deformed without fracture

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10
Q

What is the difference between thermo setting plastics and thermoplastics?

A

Thermoplastics can be softened when heated where as thermo setting plastics can not

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11
Q

What are some thermo setting plastics and their properties?

A

Melamine formaldehyde - smooth surfaces
Polyester resin - tough
Urea formaldehyde - colourless
Epoxy resin - good heat resistance

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12
Q

What are some thermoplastics and their properties?

A 
Acrylic - hardwearing
PVC - strong
ABS - lightweight
Nylon - good wear resistance
Rigid polystyrene- light but strong
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13
Q

What are some hardwoods and their properties?

A

Mahogany - expensive and imported
Beech - close-grained
Ash - creamy white or light brown

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14
Q

What are some softwoods and their properties?

A

Pine - cheap

Cedar - comes from North America

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15
Q

What are some manufactured boards and their properties?

A

Plywood - made from layers of wood
MDF - made from small particles of wood chips
Chipboard - made of chips from wood

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16
Q

What are some ferrous metals and their properties?

A

Mild steel - rusts easily
Carbon steel - hard
Stainless steel - soft and light

17
Q

What are some non ferrous metals and their properties?

A

Aluminium - soft
Copper - tough
Brass - heavy

18
Q

What is the difference between ferrous metals and non ferrous metals?

A

Ferrous metals contain iron where as non ferrous metals do not

19
Q

What is an alloy?

A

The combination of 2 metals

20
Q

What is graphene and some of its properties?

A

Graphene is a super thin layer of graphite

  • thinnest material in the world
  • strongest material in the world
  • most conductive materials in the world
21
Q

What is a thermochromic pigment?

A

Liquid crystals that change colour when the temperature changes

22
Q

What are some finishing techniques for metal?

A

Paint, polishing, dip coating, galvanising

23
Q

What are some finishing techniques for wood?

A

Paint, varnishing, staining, oil

24
Q

What are the finishing techniques for plastics?

A

Polishing

25
Q

What are the 4 stages to using a line bender?

A

Stage 1 : mark where you want to bend
Stage 2 : place the plastic on the rests
Stage 3 : turn the strip heater on and flip the plastic over every 30 seconds
Stare 4 : when the plastic becomes flexible, it is placed in a jig

26
Q

What are the 9 stages to vacuum forming?

A

Stage 1 : make a former out of soft wood
Stage 2 : place the former in the vacuum former
Stage 3 : clamp a sheet of plastic above the mould
Stage 4 : turn the heater on
Stage 5 : after a few minutes the plastic will be ready for forming
Stage 6 : turn off the heat and lift the mould using the lever
Stage 7 : the vacuum is turned on to pump out the air beneath the plastic
Stage 8 : remove the plastic sheet
Stage 9 : trim excess plastic

27
Q

What are the 3 stages of soldering?

A

Stage 1 : make sure that the tip of the iron is in tact
Stage 2 : remove any film from the tracks using a PCB eraser
Stage 3 : clamp in the PCB

28
Q

What are the 3 stages for pop riveting?

A

Stage 1 : the 2 pieces of plastic are driller to a size slightly larger than the rivet
Stage 2 : pass through the pop rivet
Stage 3 : pull handles together

29
Q

What are the 6 stages to brazing?

A

Stage 1 : clean the steel
Stage 2 : turn compressor on
Stage 3 : turn gas air control on
Stage 4 : raise both pieces of steel using a fire brick
Stage 5 : move flame forward
Stage 6 : a barking rod is then pushed gently against the joint

Technology Year 11 (2 decks)

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