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The bar screens used to cover the dam outlets to prevent entry of debris, or ice into the spillway conduits are called __________________

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in Irrigation Engineering by (75.2k points)
The bar screens used to cover the dam outlets to prevent entry of debris, or ice into the spillway conduits are called __________________

(a) gate controlled ports

(b) projecting collars

(c) trash racks

(d) intakes

I got this question in exam.

My doubt is from Dam Outlet topic in chapter Pressure Conduits, Outlet Works through Dams and Rivers of Irrigation Engineering

1 Answer

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by (106k points)
The correct choice is (c) trash racks

The best explanation: The trash racks are made from steel bars at a spacing of about 5 to 15 cm c/c in both the directions. The floating objects like debris, ice get collected on these racks and can be removed by manual labor as well as automatic power-driven system. The spacing depends upon the maximum size of debris required to be excluded.

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