Hydraulics and Fluid Mechanics Questions

• The velocity of liquid flowing through an orifice varies with the available head of the liquid.
• A moving fluid mass may be brought to a static equilibrium position, by aplying an imaginary inertia force of the same magnitude as that of the accelerating force but in the opposite direction. This statement is called
• The specific gravity of water is taken as
• The total pressure on the bottom of a closed cylindrical vessel completely filled up with a liquid is the sum of the total centrifugal pressure and the weight of the liquid in the vessel.
• When the Mach number is more than 6, the flow is called
• When the Mach number is equal to unity, the flow is called sonic flow.
• Poise is the unit of viscosity in C.G.S. system of units.
• The reciprocal of Euler's number is called Newton number.
• When a body is immersed wholly or partially in a liquid, it is lifted up by a force equal to the weight of liquid displaced by the body. This statement is called
• The unit of surface tension is
• The total pressure on the top of a closed cylindrical vessel competely filled up with a liquid is
• The ratio of the inertia force to the __________ is called Euler's number.
• The body will float if the force of buoyancy is __________ the weight of the liquid displaced.
• A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall acts at a distance __________ from the liquid surface.
• Kinematic viscosity is the product of dynamic viscosity and the density of the liquid.
• The top of the weir over which the water flows is known as
• A notch is, usually, made of a metallic plate.
• The pressure of liquid at throat in a venturimeter is __________ than that at inlet.
• A thick liquid like a syrup has a __________ viscosity than a light liquid like water.
• The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called