Q4). Out of the three materials aluminium, copper and cast iron, which is the most suitable...

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Q4). Out of the three materials aluminium, copper and cast iron, which is the most suitable for the following specification of a solid cylinder rod ? Diameter: 8 mm Length: 750 mm Applied Torque: 5 Nm Angle of twist: 15 degrees Q4). Out of the three materials aluminium, copper and cast iron, which is the most suitable for the following specification of a solid cylinder rod ? Diameter: 8 mm Length: 750 mm Applied Torque: 5 Nm Angle of twist: 15 degrees