Hydraulics and Fluid Mechanics Questions

• Reynold's number is the ratio of inertia force to
• The volume per unit mass of a liquid is called specific volume.
• If a body floating in a liquid does not return back to its original position, and heels farther "away when given a small angular displacement, the body is said to be in neutral equilibrium.
• The length of the divergent cone in a venturimeter is __________ that of the convergent cone.
• A compound pipe of diameter d1, d2 and d3 having lengths l1, l2 and l3 is to be replaced by an equivalent pipe of uniform diameter d and of the same length (l) as that of the compound pipe. The size of the equivalent pipe is given by
• An air vessel is provided at the summit in a syphon to
• The viscosity of a liquid is due to cohesion of its particles.
• The unit of dynamic viscosity in S.I. units is
• The velocity corresponding to Reynold number of 2800, is called
• A flow in which the viscosity of fluid is dominating over the inertia force is called
• Laminar flow __________ place at very low velocities.
• Bulk modulus of a fluid __________ as the pressure increases.
• The Newton's law of resistance is based on the assumption that the
• When a cylindrical vessel, containing some liquid, is rotated about its vertical axis, the liquid surface is depressed down at the axis of its rotation and rises up near the walls of the vessel on all sides. This type of flow is known as
• A compound pipe is required to be replaced by a new pipe. The two pipes are said to be equivalent, if
• In a footstep bearing, if the speed of the shaft is doubled, then the torque required to overcome the viscous resistance will be
• The discharge over a triangular notch is
• If an incompressible liquid is continuously flowing through a pipe, the quantity of liquid passing per second is different at different sections.
• When the pipes are in series, the total head loss is equal to the sum of the head loss in each pipe.
• An open tank containing liquid is made to move from rest with a uniform acceleration. The angle 0 which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due to gravity)