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Design Technology > GCSE Resistant Materials - Metals > Flashcards

GCSE Resistant Materials - Metals Flashcards

1
Q

How do you mark metal?

A
  • Straight steel edge and scriber (sharp straight line)
  • Odd leg calipers (a parallel line)
  • Engineer’s square (perpendicular angle)
  • Mitre square/ Combination square (45• angle)
  • Dot/ Centre punch (centre of hole)
  • Centre Square (centre of round piece of material)
  • Dividers (arches curves and circles)
  • Template (an irregular shape)
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2
Q

How do you cut metal?

A

Hacksaw

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3
Q

How does Sand Casting work?

A

Metals, melted and poured into mould of special sand

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4
Q

How does extrusion work?

A

(Thermoforming plastics and) Metals, heated, then pushed through a die

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5
Q

How does die casting work?

A

Metal melted and forced into hardened tool steel mould

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6
Q

What is a ferrous metal?

A

Metals and alloys containing iron

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7
Q

What is a non-ferrous metal?

A

Metals and alloys that do not contain iron

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8
Q

What is work hardening?

A

Non-ferrous metal continuously bent, hit or shaped over period of time

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9
Q

What is annealing?

A

Heat and then let the metal cool. It’s molecular structure changes and can be cut and shaped more equally.

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10
Q

What is the finish galvanising?

A

Chemical process coats the base material in zinc

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11
Q

What is the finish anodising?

A

Electrolysis, acid + electrical current for protective layers on base material

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12
Q

What is the finish electroplating?

A

Chemically using electricity to add layers of other metals

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13
Q

What is the finish paint?

A

Spray or brush

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14
Q

What is the finish oil/grease?

A

Sprayed, rubbed or smeared onto exposed surfaces

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15
Q

What is the finish polish?

A

Machine buffing or by hand using a cloth

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16
Q

What is the finish plastic coat dipping?

A

Metal dipped into tank of thermoplastic coating removed, and left to cool

17
Q

What is the finish powder coating?

A

Powder is applied via an electrostatic spray gun. Product heated, powder melts

18
Q

How does brazing work?

A

Two pieces of metal heated, a third metal introduced to the joint being heated. Once molten heat removed and brass cools and solidifies.

19
Q

How does soldering work?

A

Where solder “flows along the cleaned components bonding them together once it solidifies

20
Q

How does welding work?

A

Heated together and join after it cools and solidifies

21
Q

How does riveting work?

A

Small piece of metal inserted into a hole. Deformed to the extent it cannot be removed.

22
Q

What is an internal thread cutting?

A

One that uses nuts and tapped holes

23
Q

What is an external thread cutting?

A

One that uses bolts, studs, or screws

Design Technology (5 decks)

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