Free Irrigation and Water Management MCQs with Answers

• A. (2 gh)1/2
• B. 2(gh)1/2
• C. 2g (h)1/2
• D. 2gh

Explanation: Using Torricelli’s theorem, the theoretical jet velocity under a head h is v = √(2gh).

• A. Non-uniform flow
• B. one-dimension flowAccess Government Careers
• C. steady flow
• D. un-steady flow

Explanation: A one-dimensional flow is represented by straight, generally parallel streamlines, with the flow variables considered to change mainly in…

• A. Uniform flow
• B. Turbulent flow
• C. Steady flow
• D. None of these

Explanation: Flow is called steady when the discharge or other flow properties at a given point do not change with time.

• A. None of these
• B. Law of gravity
• C. Newton's law of otion
• D. Archimed's Principle

Explanation: Archimedes’ principle states that an immersed body experiences an upward buoyant force equal to the weight of the fluid it displaces.

• A. w H
• B. WH2 2
• C. W.H/2
• D. wh2

Explanation: For a vertical wall submerged to depth H, pressure increases linearly from zero at the surface to wH at the bottom, forming a triangular…

• A. Capillarity
• B. Compressibility
• C. Viscosity
• D. Specific gravity

Explanation: Viscosity is the internal resistance of a liquid to relative movement between its layers, so it controls how readily the liquid flows.

• A. Specific weight
• B. Specific gravity
• C. Mass density
• D. None of these

Explanation: Mass density is defined as mass per unit volume, expressed as ρ = m/V. Specific weight is weight per unit volume, while specific gravity…

• A. All are correct
• B. Armouring
• C. Revetment
• D. Pitching

Explanation: Placing stone boulders or similar material on an embankment slope to resist wave wash is called pitching.

• A. Gravity water
• B. Capillary water
• C. Hygroscopic water
• D. All are correctOrder Water Delivery

Explanation: Gravity water moves downward through unsaturated soil under the force of gravity, unlike hygroscopic water, which is tightly held by soil…

• A. Discharge
• B. Specific volume
• C. Specific capacity
• D. All are correct

Explanation: Specific capacity is the well's discharge divided by the corresponding drawdown, commonly expressed as litres per minute per metre of…

• A. 2%
• B. 2.5%
• C. 3%
• D. 3.2%

Explanation: Freshwater makes up about 2.5% of the Earth's total water; the remaining roughly 97.5% is saline.

• A. 1.35 x 10^9km3
• B. 1.32 x 10^9km3
• C. 1.33 x 10^9km3
• D. 1.30 x 10^9km3

Explanation: The Earth's total water volume is commonly estimated at about 1.35 to 1.4 billion cubic kilometres, so 1.35 × 10^9 km³ is the closest…

• A. 3 - 4m/sec
• B. 4 - 5m/sec
• C. 5 - 6m/sec
• D. 6 - 7m/sec

Explanation: Concrete lining reduces seepage and protects the tunnel from erosion, allowing a relatively high permissible velocity.

• A. Turbulent flow
• B. Laminar flow
• C. Circular flow
• D. Rotational flow

Explanation: In rotational flow, water particles move downstream while also rotating about their own mass centres.

• A. Hot wire anemometer
• B. Hot wire manometer
• C. Barometer
• D. All are correct

Explanation: A hot-wire anemometer determines gas velocity from the cooling effect of moving gas on a heated wire.

• A. Pressure head + velocity head
• B. Pressure head + datum head
• C. Velocity head
• D. Water surface

Explanation: The hydraulic gradient line represents total piezometric head, which is elevation head plus pressure head.

• A. Top of pipe
• B. Bottom of pipe
• C. Centre of pipe
• D. All are correct

Explanation: In a full pipe, friction makes velocity zero at the wall and progressively higher toward the centre.

• A. Marginal embankment
• B. Embankment
• C. Dyke
• D. Flood protective bund

Explanation: A marginal embankment is a flood-control earth bank constructed parallel to a river, usually set back from its natural banks.

• A. A tunnel
• B. Penstock
• C. Chute
• D. Syphon

Explanation: A penstock is a closed pressure conduit that carries water to a turbine in a hydropower installation.

• A. 90°
• B. 100°
• C. 110°
• D. 120°

Explanation: The head regulator is set obliquely to the approaching flow so water enters the canal smoothly and excessive eddies are reduced.