42251. The centre of pressure of a vertical plane immersed in a liquid is at
42252. 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
42253. A body of dimensions 1.5 m x 1.0 m x 2 m weighs 3000 kg in water. Its specific gravity is
42254. An orifice is called a large orifice if water head, is
42255. When a liquid rotates at constant angular velocity about a vertical axis of a rigid body, the pressure
42256. For the two dimensional flow, the stream function is given by ψ = 2xy. The velocity at a point (3, 4) is
42257. A floating body attains stable equilibrium if its metacentre is
42258. The unit of the viscosity is
42259. Water flows through a convergent mouthpiece of diameter 4 cm at convergence under a head of 3 metres. If the maximum vacuum pressure is 9 metres of water, the maximum diameter of divergence, to aviod separation of flow, is
42260. An ideal fluid
42261. In C.G.S. system the units of kinematic viscosity, is
42262. A triangular notch is preferred to a rectangular notch because
42263. In case of laminar flow through a circular pipe,
42264. The pressure less than atmospheric , pressure, is known
42265. If H is the difference of liquid levels on two sides of an orifice (width b, depth d), the discharge through the orifice will be
42266. A rise or fall of liquid in a glass tube of a very small diameter when dipped is
42267. To measure very low pressure, we use
42268. If a pitot tube is placed with its nose facing down stream, the liquid
42269. The discharge through an internal mouth piece is more if its length is
42270. The concept of overall heat transfer coefficient is used in case of heat transfer by:
42271. If there are 4 number of fundamental dimensions and 7 number of variables,then the number of pi terms for dimensional analysis will be:
42272. Chezy's formula is used to determine
42273. The metacentric height of a body equals the distance between
42274. Discharge through a totally submerged orifice, is directly proportional to
42275. Frictional loss of head includes the loss of energy due to
42276. The length of hydraulic jump is roughly
42277. To ensure that water does not rise more than 100 cm above the crest, for a discharge of 5.00 m3/sec, the length of water will be
42278. For a most economical trapezoidal open channel, the half of the top width must be equal to
42279. Pick up the correct statement regarding convergent divergent mouth piece from the following :
42280. The value of kinetic energy correction factor (a) for a laminar flow through a circular pipe, is
42281. The formula Q = m x L x 2g x H3/2 where was suggested by :
42282. One metric slug is equal to
42283. Falling drops of water become spheres due to
42284. The most efficient channel section, is
42285. With a clinging nappe of a weir, the excess discharge, is
42286. For steady flow in open channels, which one of the following does not change :
42287. If v1 and v2 are the velocities of flow before and after sudden enlargement in a pipe, the head loss given by Carnot and Borda equation, is
42288. Equation of continuity of fluids is applicable only if
42289. The flow in open channel is said to be critical if the Froude number is :
42290. An orifice is an opening in a vessel with
42291. The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particles at each point, is called
42292. A nozzle is fitted at the end of a pipe whose length is 320 m and diameter is 10 cm. If the value of f = 0.01, the diameter of the nozzle for the maximum transmission of power through the nozzle is
42293. When the whole fluid mass rotates either due to fluid pressure or gravity or rotation previously imparted, the motion is known as
42294. The ratio of the maximum height to which a jet inclined through θ rises to its total horizontal span is
42295. For solving the problems is hydraulic engineering, the velocity used is
42296. The shape of fire hose nozzle is generally kept
42297. The dimensions MLT-2 refers to
42298. The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different cross-sections of a conduit, is known as
42299. Practical fluids possess
42300. The depth of the centre of pressure on a vertical rectangular gate (4 m wide, 3 m high) with water upto top surface, is
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