Hydraulics Questions

• The flow in open channel is laminar if the Reynold number is
• The initial difference between liquid levels of two identical cylindrical vessels having their area of cross-section A, is H. Flow time T from one vessel to another through an orifice having coefficient of discharge Cd and area a will be
• The ratio of the hydraulic radius of a pipe running full to the hydraulic radius of a square section of a channel whose side is equal to the diameter of the pipe, is
• Most economical section of a circular channel for maximum velocity, is if,
• If E1 and E2 are the specific energies at the start of back water curve and at the maximum rise of water respectively and ib and ie are the head slope and the energy line slope respectively, the length of back water (L) is given by
• The ratio of the percentage error in the discharge and percentage error in the measurement of head, over rectangular notch, is
• For the two dimensional flow, the stream function is given by ψ = 2xy. The velocity at a point (3, 4) is
• Pick up the incorrect statement from to following regarding triangular notch :
• The flow in open channel is said to be subcritical if the Froude number is
• The width of a weir with end contraction, is
• If the pressure at the inlet of a pipe is 90 kg/cm2 and pressure drop over the pipe line is 10 kg/cm2, the efficiency of transmission, is
• Centre of buoyancy is
• Total energy line is
• A body of dimensions 1.5 m x 1.0 m x 2 m weighs 3000 kg in water. Its specific gravity is
• An orifice is called a large orifice if water head, is
• In a two dimensional flow if the components of the velocity are u = ax ; v = by, the point where no motion occurs, is known as
• The unit of the viscosity is
• In steady flow, which one of the following changes with time
• A stepped notch is a combination of
• For a most economical trapezoidal open channel, the half of the top width must be equal to