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# GATE (CE) 2022 : HYDROLOGY AND IRRIGATION QUIZ#9

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Question 1

The uplift force on a dam having water depth of 65m at upstream and 5m at downstream and base width of 30m with no infiltration gallery provided will be _______kN. [Take Y

_{w}= 9.81 KN/m^{3}]Question 2

What is the maximum vertical stress(N/m^2) acting on a dam If sum of the net vertical force per unit length is 10500N/m Width of the dam is 60m, eccentricity is 15m.

Question 3

A drop spillway is subjected to horizontal and vertical forces of 40.8 kN and 36.5 kN respectively. The area of plane of sliding is 10m

^{2}. Angle friction and cohesive resistance of foundation material are 25 ° and 4.9 kPa respectively. The factor of safety against sliding is? Assume tan 25°= 0.47Question 4

A weir on a permeable foundation with downstream sheet pile of the depth 8 m. The height of weir is 10 m, the height of water is 8.6 m and length of floor is 10 m. The exit gradient as per Khosla's method is

Question 5

The base width of a solid gravity dam is 25 m. the material of the dam has a specific gravity of 2.56 and the dam is designed as an elementary profile ignoring uplift. What is the approximate allowable height of the dam?

Question 6

A gravity dam may fail by

(i) Overturning about the toe

(ii) Overturning about the heel

(iii) Crushing at the heel

(iv) Tension cracks at the heel

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Jul 30ESE & GATE CE

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