Bulking of sand is maximum if moisture content is about________?

Which one of the following attributes is not associated with digital maps________?

When a wave strikes a vertical breakwater in deep water, it is reflected back and on meeting another advancing wave of similar amplitude merges and rises vertically in a wall of water. This phenomenon is called________?

Bottom openings 15 cm × 15 cm in the standing baffle wall are provided________?

The basic action involved in sheep foot rolling is________?

At the centre line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be________?