147) A submerged body is said to be in a stable equilibrium, if its centre of gravity __________ the centre of buoyancy.

148) The liquid used in manometers should have

149) The viscosity of a liquid __________ its rate of flow through a hole in a vessel.

150) The formula for discharge over a sharp-crested weir and Ogee weir is same as that of a rectangular weir

151) The Cippoletti weir is a __________ weir.