51) Bulk modulus of a fluid __________ as the pressure increases.

52) The hydraulic gradient line may be above or below the centre line of the pipe.

53) A water tank contains 1.3 m deep water. The pressure exerted by the water per metre length of the tank is

54) The specific gravity has no units.

55) The depth of water in a channel corresponding to the minimum specific energy is known as critical depth.