Q. Hydraulic gradient is equal to difference in water surfaces

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Q. The valve closure is said to be sudden if

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Q. If Re is the Reynolds's number, the coefficient of friction for laminar flow is

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Q. The length of pipe is L, velocity of flow of a liquid in the pipe is V. If t is the time in second required to close the valve, the head of pressure

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Q. Kinematic viscosity of liquids by following equation is determined by :

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Q. A cylinder 3 m in diameter and 4 m long retains water one side as shown in the below figure. If the weight of the cylinder is 2000 kgf, the vertical reaction at A is

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Q. In the following Newton's viscosity equation, the coefficient (μ) is known as coefficient of

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Q. Which one of the following equation is applicable to unsteady flow in open channels :

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Q. Dimensions of the dynamic viscosity (μ) are

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Q. For pipes not running full, the hydraulic mean depth is given by

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Q. The following equation for the viscosity, is suggested

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Q. The ratio of time for completely emptying the hemispherical tank and circular horizontal tank of equal radii both fitted with similar orifices at their bottoms is :

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Q. To replace a pipe of diameter D by n parallel pipes of diameter d, the formula is

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Q. If a1 and a2 are the cross-sectional areas of a tank and orifice, h the height of water level in tank above the centre of the orifice, the velocity of approach is given by

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Q. 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

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Q. The velocity of flow at the critical depth (hc) is called critical velocity (Vc) which is equal to

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Q. Mass density of liquid (ρ) is given by

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Q. 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

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Q. 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

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Q. A load w is rolled a distance d across the deck of a ship of weight W, due to which the ship heels through θ°. The metacentric height of the ship, is

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