Steam Boilers and Engines on Physics related Questions and Answers

Question :   The thickness of a sharp crested weir is kept less than 1. one-fourth of the height of water on the sill 2. two-third of the height of water on the sill 3. one-third of the height of water on the sill 4. one-half of the height of water on the sill Answer :   4 - one-half of the height of water on the sill