Size Reduction and Separation

Bond's Work Index $W_i$ is defined as the gross energy required in kilowatt-hours per short ton to reduce feed of very large size to:

Options:

• (A) $80\%$ passing through a $100\text{ \mu m}$ sieve
• (B) $100\%$ passing through a $1\text{ mm}$ sieve
• (C) $50\%$ passing through a $10\text{ \mu m}$ sieve
• (D) $10\%$ passing through a $1\text{ cm}$ sieve