Q. What is the range of value of Manning’s coefficient for straight alignment for cast in-situ concrete lining?

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Q. Lining decreases the channel capacity and consequently reduces the required channel section.

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Q. Removal of silt considerably reduces the annual expenditure required on unlined channels for desilting.

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Q. Which of the following statement is wrong?

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Q. Which of the following statement is wrong?

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Q. What types of channel sections are usually adopted?

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Q. What is the maximum permissible velocity in Cement concrete lining (Unreinforced) as per Indian Standards?

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Q. What is the minimum value of free-board for Main and Branch Lined canals if the discharge is more than 10 cumecs as per specified by BIS code?

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Q. What is the minimum value of inspection bank width recommended by Indian Standards if the discharge is more than 30 cumecs?

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Q. The distance measured above the F.S.L and to the top of the lining is known as free-board.

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Q. When the concrete lining is not reinforced in a channel, velocities up to 2.5 m/sec are permitted.

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Q. Calculate hydraulic mean depth for concrete-lined channel to carry a discharge of 350 cumecs at a slope of 1 in 5000. The value of manning’s constant for the lining is 0.015. The side slopes of a channel may be taken as 1.5:1. Assume limiting velocity in the channel as 2m/sec.

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Q. Calculate the central depth of a triangular channel section to carry a discharge of 15 cumecs. Consider the available slope as 1 in 9000. Assume the side slopes of the channel be 1.25:1 and manning’s constant is 0.015 for good brick work in lining.

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Q. Which type of lining is applied under pressure?

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Q. Which type of lining is popular in India?

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Q. Which type of lining is mixed and placed under temperature?

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Q. What is the biggest advantage of boulder lining?

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Q. Which type of lining is only used for lining the side slopes of the canal?

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Q. Shotcrete lining can be used highly for smaller jobs.

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Q. Brick lining gives a very satisfactory service.

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