Q1: Cast iron has the unique property of high

ANS:B - damping characteristics

Cast iron has the unique property of high damping characteristics. Damping refers to the ability of a material to dissipate vibrational energy, thereby reducing vibrations and noise. Cast iron is known for its excellent damping properties, which make it effective in absorbing and dissipating vibrations. This property is particularly advantageous in applications where vibration control and noise reduction are important considerations, such as in machine bases, engine blocks, and brake components.