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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Q. Which type of cement grade is used in cement concrete lining?

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Q. For how many days curing of concrete lining takes place?

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Q. In the laying of concrete, what paper is laid to make filter blanket effective?

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Q. In soil-cement lining the Portland cement is added to the soil up to the extent of ____________

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Q. Which type of lining is restricted to the availability of suitable soils in the area?

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Q. Which lining is restricted to small canals and water-courses?

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Q. A flexible membrane impregnated with tar or bitumen is spread over the subgrade in _________________

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Q. Puddle clay is laid on the subgrade to form a fairly water-tight coating.

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Q. What is the safe limiting velocity for cement concrete lining?

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Q. The most economical type of lining is the one which shows ____________

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