Correct answer: (A) Specific energy3.0 m; (C) Froude number1.0
Explanation
At critical flow,$Fr=1$. For a rectangular section,$v_c^2=gy_c$,so specific energy $E_c=y_c+v_c^2/(2g)=3y_c/2=3$ m at depth 2 m. Hence the correct statements are **A, C**.
More Environmental Hydraulics questions
GATE 2024 ES Q47– A 3 m×2 m tunnel flows full at 1 m/s with head loss1 m/km. Use g=10 m/s². Which statements…
GATE 2024 ES Q56– For the L-shaped hinged gate shown, find water level h above the hinge at which it begins…
GATE 2023 ES Q31– A 2 m wide rectangular channel carries10 m³/s. Find critical depth in m, to two decimals,…
GATE 2023 ES Q52– A concrete-lined trapezoidal canal has n=.01,Q20 m³/s, slope1:400,side slope2H:1V and…
GATE 2023 ES Q53– A 314 kN plunger balances oil of specific gravity.9 in a 1.5 m diameter vessel. A 1.5 cm…
GATE 2023 ES Q57– An oil pipeline must carry20 L/s under laminar conditions. Kinematic viscosity6×10⁻⁶ m²/s…