Q. According to Bligh, a vertical cut-off at U/s end of the floor is less useful than the one at the D/s end of the floor.

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Q. Consider the following statements about Bligh’s Creep Theory.

i. Creep length is the length of path traversed by percolating water

ii. To increase the path of percolation vertical cut-off or sheet piles can be provided

iii. Loss of head per unit creep length is hydraulic gradient

iv. Bligh gave no criteria for the safety of weir against undermining

Which of the following statements are correct?

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Q. As per Bligh’s theory, thickness to be provided by taking a factor of safety equal to _______

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Q. Lane’s in his theory proposed that horizontal creep is more effective than the vertical creep.

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Q. In Lane’s weighted creep theory, he suggested a weightage factor _________

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Q. Which of the following limitation of Bligh’s theory forms the basis of Lane’s creep theory?

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Q. What is the value of Lane’s coefficient for fine sand and coarse sand?

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Q. What is the range of Lane’s coefficient for clayey soils?

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Q. The laplacian equation represents two sets of curves intersecting orthogonally.

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Q. What is the path represented by the streamlines?

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Q. How many corrections are needed for the complex profile broken from simple forms, to be valid?

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Q. By how many considerations the depth downstream vertical cutoff is governed?

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Q. Khosla’s theory of flow nets says that the loss head does not take place uniformly.

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Q. What is laplacian equation?

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Q. What type of points is needed to be joined to form an equipotential line?

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Q. The component of which force is to be counterbalanced so that the soil grains remain stable?

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Q. What is the name of the gradient pressure at the exit end?

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Q. Which method is evolved by khosla for designing of hydraulic structures?

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Q. What is the formula for the upstream apron length according to Bligh?

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Q. What is the empirical formula given by Bligh for the design of the top width of the weir wall?

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