85301. In an external or internal mouthpiece, the absolute pressure head at vena contracta is zero when atmospheric pressure head is 10.3 m of water.
85302. In a short cylindrical external mouthpiece, the vena contracta occurs at a distance __________ the diameter of the orifice from the outlet of orifice.
85303. Viscous force is the __________ of shear stress due to viscosity and cross-sectionar area of flow.
85304. The density of air is same at different heights.
85305. The total pressure on a horizontally immersed surface is (where w = Specific weight of the liquid, A = Area of the immersed surface, and x = Depth of the centre of gravity of the immersed surface from the liquid surface)
85306. A body floating in a liquid is said to be in a stable equilibrium, if its metacentre coincides with its centre of gravity.
85307. When an internal mouthpiece is running free, the discharge through the mouthpiece is (where a = Area of mouthpiece, and H = Height of liquid above the mouthpiece)
85308. A flow through an expanding tube at increasing rate is called unsteady non-uniform flow.
85309. Water is __________ liquid.
85310. With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will
85311. The rise, in water level, which occurs during the transformation of the unstable shooting flow to the stable streaming flow is called hydraulic jump.
85312. One stoke is equal to
85313. The water hammer in pipes occurs due to sudden change in the velocity of flowing liquid
85314. A venturiflume is a flumed structure constructed across a channel by restricting its width.
85315. The velocity corresponding to Reynold number of 2000 is called
85316. The specific weight of water in S.I. units is taken as
85317. The flow in a pipe is laminar, when Reynold number is less than 2000.
85318. The power transmitted through the pipe is maximum when the head lost due to friction is equal to
85319. The specific weight of sea water is __________ that of pure water.
85320. If a body floating in a liquid occupies a new position and remains at rest in this new position, when given a small angular displacement, The body is said to be in __________ equilibrium.
85321. The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to
85322. A flow is called sub-sonic, if the Mach number is
85323. The discharge of a depressed nappe is 6 to 7 percent __________ that of a free nappe.
85324. Re-entrant or Borda's mouthpiece is an __________ mouthpiece.
85325. The flow in a pipe is neither laminar nor turbulent when Reynold number is
85326. The intensity of pressure on an immersed surface __________ with the increase in depth.
85327. According to Pascal's law, the intensity of pressure at any point in a fluid at rest is the same in all directions.
85328. The ratio of the inertia force to the surface tension force is called Weber's number.
85329. For a perfect incompressible liquid, flowing in a continuous stream, the total energy of a particle remains the same, while the particle moves from one point to another. This statement is called
85330. The buoyancy depends upon the
85331. In an internal mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta.
85332. When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is
85333. The total energy line lies over the centre line of the pipe by an amount equal to
85334. A piezometer tube is used only for measuring
85335. The flow in a pipe is turbulent when Reynold number is
85336. When a tank containing liquid moves with an acceleration in the horizontal direction, then the free surface of the liquid
85337. The discharge through a small rectangular orifice is given by (where Cd = Coefficient of discharge for the orifice, a = Cross-sectional area of the orifice, h = Height of the liquid above the centre of the orifice)
85338. The siphon will work satisfactorily, if the minimum pressure in the pipe is __________ vapour pressure of liquid.
85339. The difference between the notch and weir is that the notch is of bigger size and the weir is of a smaller size.
85340. An open tank containing liquid is moving with an acceleration on an inclined plane. The inclination of the free surface of the liquid will be __________ to the acceleration of the tank.
85341. Euler's number is the ratio of __________ force to pressure force.
85342. The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to
85343. The ratio of velocity of fluid in an undisturbed stream to the velocity of sound wave is known as Mach number.
85344. All the gases are considered to have compressible flow and all the liquids are considered to have incompressible flow.
85345. When a cylindrical vessel containing liquid is revolved, the surface of the liquid takes the shape of
85346. The hydraulic mean depth or the hydraulic radius is the ratio of
85347. The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as
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