GATE 2023 Irrigation Engineering Rank Booster Quiz 37

In a Lacey’s Regime channel, the discharge is 100m³/s and the longitudinal slope is 0.0002. The silt factor of this channel is?

For a trapezoidal channel having width 3.45 m, side slope 1:1 and depth 2.15 m, the average shear stress on the sides of the channel is (N/m², round off to two decimal places)

(The bed slope can be taken equal to 1 in 4500)

The profile of the gravity dam is as shown in the figure and water is filled up to the crest. Take γ_concrete=25 kN/m³, γ_water = 10 kN/m³. Neglecting uplift pressure, the location of resultant force (in m, correct up to two decimal places) at the base from the toe of the dam is ____.

Find the factor of safety against overturning for dam section. Ignore uplift.

A horizontal impervious floor of length 20 m is provided with a cutoff of a 4 m depth at its downstream end. If the head causing the flow is 2m, find the exit gradient for the soil. Take G_s = 2.7 and void ratio is 0.70. Round off to three decimal digits.

For cross drainage works, which of the following statement is true?

A channel for alluvia soil has following data

1) Q = 80 cumsec

2) Slope = 1/3000

3) Manning rugosity coefficient = 0.015

4) Side slope =

5) Tractive stress = 0.0013 kN/m²

Using tractive force choose use(r_w = 9.81 kN/m³) correct option