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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Q. If a pitot tube is placed with its nose facing down stream, the liquid

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Q. The velocity of flow (v) at the outlet of a syphon of length l, is given by

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Q. The dimensional formula of force is

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Q. For an irrotational flow, the following equation is given by

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Q. Chezy's constant given by following equation is suggested by

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Q. The discharge through a V-notch weir varies as

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Q. If L, D and f are the length, diameter and coefficient of friction of a pipe, the ratio of the areas of the pipe A and nozzle a, to transmit maximum power, is

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Q. The pressure variation along the radial direction for vortex flow along a horizontal plane is related by

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Q. The minimum specific energy of flow of water in open channel is : (where hc is the critical depth)

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Q. Specific energy of a flowing fluid per unit weight is

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Q. Discharge with velocity of approach, over a rectangular weir is

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Q. The detention time of a circular tank of diameter d and water depth H, for receiving the sewage Q per hour, is

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