GATE CE 2025 Paper 2 — page 9

Questions 25–27 of 65. Imported answers require review unless explicitly marked reviewed.

Pick one or more CORRECT statement(s) from the choices given below, in the context of upstream and downstream cut-offs provided below the concrete apron of weirs / barrages constructed across alluvial rivers.

Your answerSelect all correct options. You can choose more than one.

Cut-offs are provided to increase the rate of flow over the weir / barrage.

Cut-offs are provided to increase the seepage length and prevent failure due to piping.

The bottom level of cut-offs mainly depends on the scour depth.

Cut-offs are provided to ensure occurrence of hydraulic jump within the stilling basin.

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In the context of the effect of drainage density on the run-off generation and the hydrograph at the catchment outlet, all other factors remaining the same, pick one or more CORRECT statement(s) from the choices given below.

Your answerSelect all correct options. You can choose more than one.

Lower drainage density results in higher peak in flood hydrograph compared to that when the drainage density is higher.

Lower drainage density results in lower peak in flood hydrograph compared to that when the drainage density is higher.

Lower drainage density results in a flood hydrograph with a longer time base compared to that when the drainage density is higher.

Lower drainage density results in a flood hydrograph with a shorter time base compared to that when the drainage density is higher.

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Identify the treatment technology/technologies NOT recommended for highly biodegradable organic solid wastes.

Your answerSelect all correct options. You can choose more than one.

Biohydrogen

Anaerobic digestion

Composting

Open dumping

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2025 · Paper 2

Question 25

Question 26

Question 27