GATE Water Resources and Environmental Hydraulics: Environmental Hydraulics – Previous Year Questions
23 GATE previous year questions on Environmental Hydraulics (Water Resources and Environmental Hydraulics, Environmental Science and Engineering) with answers and explanations, from every paper.
- GATE 2021 ES Q15 – In fluid statics, the buoyant-force line of action always passes through .
- GATE 2021 ES Q35 – A 4 cm diameter orifice produces a 3.5 cm jet diameter at vena contracta. Velocity coefficient .98. Find discharge coefficient, to two decimals.
- GATE 2021 ES Q54 – A 10 m wide rectangular channel carries20 m³/s at 1 m depth. Using g=10 m/s²,find specific energy in m, to one decimal.
- GATE 2021 ES Q55 – Two pipes A, B in series have equal length and Darcy friction factor. B has twice A’s internal diameter. Ignore minor losses. Find h A/h B as an…
- GATE 2021 ES Q59 – A 900 mm sewer on slope .004 carries .15 m³/s. Manning n=.013. Find actual/full-flow discharge ratio, to two decimals. Use π=3.14.
- GATE 2022 ES Q20 – Centrifugal-pump connections are shown. Solid arrow denotes suction and dotted arrow delivery. Which is correctly connected?
- GATE 2022 ES Q58 – A water venturimeter and mercury differential manometer are shown. Mercury SG13.6,water specific weight9810 N/m³. Find p Q−p P in Pa, to one decimal.
- GATE 2022 ES Q59 – Reservoirs differ10 m in level and connect through 50 m of .10 m pipe, friction factor .02. Replace the final25 m with .20 m pipe of the same…
- GATE 2022 ES Q60 – A hydraulically efficient rectangular channel has Manning n=1/80,slope .01 and discharge64 m³/s. Find depth in m, to two decimals.
- GATE 2023 ES Q31 – A 2 m wide rectangular channel carries10 m³/s. Find critical depth in m, to two decimals, using g=9.81 m/s².
- GATE 2023 ES Q52 – A concrete-lined trapezoidal canal has n=.01,Q20 m³/s, slope1:400,side slope2H:1V and bottom width twice depth. Find flow depth in m, to two decimals.
- 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 tube connects to a pressure gauge at 1.5 m above the…
- GATE 2023 ES Q57 – An oil pipeline must carry20 L/s under laminar conditions. Kinematic viscosity6×10⁻⁶ m²/s and specific gravity.9. Find minimum diameter in m, to two…
- GATE 2024 ES Q26 – Which fluid-flow statements are correct?
- GATE 2024 ES Q27 – A rectangular channel has critical flow at depth 2 m. Select the correct statements.
- 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 are correct?
- GATE 2024 ES Q56 – For the L-shaped hinged gate shown, find water level h above the hinge at which it begins to open automatically, in metres, to two decimals.
- GATE 2025 ES Q17 – For gradually varied flow, P states y n>y c>y in an M3 profile; Q states y n<y c<y in an S1 profile. Here y n,y c,y are normal, critical and actual…
- GATE 2025 ES Q55 – Pipeline O–P–Q–R divides into parallel branches X, Y, Z between P and Q. Dimensions are shown. All pipes have friction factor .02;use g=10 m/s². The…
- GATE 2025 ES Q56 – A circular sewer with Manning n=.01 and slope1:100 flows80% full at 2 m³/s. Find diameter in metres, to three decimals.
- GATE 2026 ES Q19 – Consider: S1 Absolute pressure equals gauge pressure plus atmospheric pressure. S2 Gauge pressure uses absolute zero as datum. S3 Absolute pressure…
- GATE 2026 ES Q35 – A rectangular channel of width 5 m carries 15\,m3/s. For g=9.81\,m/s2,find the critical velocity in m/s, rounded to three decimal places.
- GATE 2026 ES Q55 – A cylindrical roller gate of diameter 6.0 m and length 10.0 m sits on a dam as shown. Water is about to spill over the gate. Find the resultant water…