Wire can be drawn from metal due to the property called 

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ISRO SAC Technician B Fitter 6 Nov 2016 Official Paper
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  1. Ductility
  2. Malleability
  3. Hardness
  4. Tenacity

Answer (Detailed Solution Below)

Option 1 : Ductility
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Explanation:

Mechanical properties:

The mechanical properties of a metal are:

  • ductility
  • malleability
  • hardness
  • brittleness
  • toughness
  • tenacity
  • elasticity

Ductility:

  • A metal is said to be ductile when it may be drawn out in tension without rupture. Wire drawing depends upon ductility for its successful operation. A ductile metal must be both strong and plastic. Copper and aluminum are good examples of ductile metals.

Malleability:

  • Malleability is the property of permanently extending in all directions without rupture by hammering, rolling, etc. to change its size and shape. Lead is a very malleable metal.

Hardness:

  • Hardness is a measure of a metal's ability to withstand scratching, wear, abrasion, and penetration.

Brittleness:

  • Brittleness is the property of a metal that permits no permanent distortion before breaking. Cast iron is an example of a brittle metal, and it will break rather than bend under shock or impact.

Toughness:

  • Toughness is the property of a metal to withstand shock or impact. Toughness is the property opposite of brittleness. Wrought iron is an example of tough metal.

Tenacity:

  • Tenacity of a metal is its ability to resist the effect of tensile forces without rupture. Mild steel, wrought iron, and copper are examples of tenacious metals.

Elasticity:

  • Elasticity of a metal is its power of returning to its original shape after the applied force is released. A properly heat-treated spring is a good example of elasticity.
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