Q. If G is the specific gravity of particles of diameter d, the velocity of settlement V in still water at T°C, according to Stoke's law, is

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Q. Pressure exerted at 90° bend in a pipe of cross-sectional area A and carrying water with a velocity V under a pressure p, is

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Q. According to Buston's formula, fire demand in litres per minute for a population of P thousands, is

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Q. The fire demand for ascertaining the following empirical formula known as

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Q. In the following equation of a logistic curve of population growth, the constant m is

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Q. The valve shown in the below figure, is generally known as

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Q. The discharge given by following equation for the confined tube well is obtained from

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Q. The formula for pipe flows, suggested by, Hazen-William is

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Q. Derivation of Thiem's formula given by following equation, is based on the assumption

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Q. If L, B and D length, breadth and depth of water in a rectangular sedimentation tank of total discharge Q, the settling velocity, is

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Q. Q is the discharge from an unconfined tube well with depression head S through a pipe of radius rw. If the radius of influence is R, the minimum required length of the strainer, is

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Q. The following formula for the head loss in conduits is generally known as

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Q. For a network of distribution pipes of a proposed township shown in the below figure, the layout of distribution system, is

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Q. For the same draw down in two observations wells at distances r1 and r2, the times after start of pumping are t1 and t2 hours respectively. The relation which holds good is

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Q. S1 and S2 are the draw downs in an observation well at times t1 and t2 after pumping. For discharge Q and coefficient of transmissibility T, the relationship, is

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Q. According to Godrich the ratio of peak demand rate to mean demand is

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Q. Disinfection of drinking water, is done to remove

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Q. Sunlight

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Q. The expected discharge to be obtained from an open well sunk in coarse sand is 0.0059 cumec. If the working depression head of the well is 3 m, the minimum diameter of the well, is

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Q. Average annual rainfall at any station is the average of annual rainfall over a period of

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