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Fill in the gap: Steel is ______ than aluminium.
Heavier
True or False: Copper is a poor conductor.
False - it's one of the best conductors of electricity.
Name 3 metals used in electrical engineering.
Copper, aluminium, steel
Why is aluminium used in power lines?
It's light, strong, and conducts electricity well.
Which process produces metal sheets?
Rolling.
Which process involves molten metal?
Casting - pouring liquid metal into moulds.
True or False: Extrusion involves melting and forcing through a die.
True - it produces rods, pipes, and cables.
What does forging do to metal?
Strengthens and refines its structure.
Name 3 materials that are flexible.
Rubber, nylon, plastic
Which material is more brittle: glass or steel?
Glass.
Why are insulators important in cables?
They prevent electric shocks and short circuits.
Name 3 metals that don't rust easily.
Aluminium, copper, stainless steel.
What does 'ductile' mean?
Can be stretched into wires, e.g., copper.
Give an example of a malleable material.
Gold can be hammered into thin sheets.
True or False: Steel is lighter than aluminium.
False
Name 3 applications of copper.
Wires, motors, plumbing - good conductor and durable.
