All Free Agriculture MCQs with Answers

• A. Syphon-aqueduct
• B. Aqueduct
• C. Cross-Drainage
• D. Non-gravity structure

Explanation: An aqueduct carries the canal over the drain, allowing the drainage water to pass below freely under gravity.

• A. Sensitive
• B. Flexible
• C. Proportional
• D. Non-flexible

Explanation: A proportional outlet changes its discharge in the same proportion as the discharge of the parent channel.

• A. Semi - Rigid
• B. Non-modular
• C. Semi-modular
• D. Modular

Explanation: A modular outlet delivers a fixed discharge within its designed operating range, largely independent of fluctuations in distributary water…

• A. Permeability
• B. Under mining
• C. Piping
• D. Up thrust pressure

Explanation: An inverted filter is arranged so that seepage encounters progressively more permeable material in the direction of flow.

• A. Piping
• B. Under mining
• C. a and b are correct
• D. Up thrust

Explanation: Placed beyond the concrete floor, an inverted filter safely releases seepage and prevents the removal of soil particles.

• A. Theory of seepage
• B. Creep theory
• C. Method of cutoffs
• D. Method of independent variables

Explanation: Khosla analysed seepage beneath hydraulic structures using the method of independent variables, which relates seepage pressures and…

• A. Down stream to up stream
• B. Up stream to down stream
• C. Top to bottom
• D. Bottom to top

Explanation: According to Khosla’s seepage analysis, harmful undermining is associated with the downstream exit zone and progresses toward the upstream…

• A. Hydraulic gradient
• B. Exit gradient
• C. Creep length
• D. Critical exit gradient

Explanation: Undermining begins when seepage emerges with excessive upward force, so the exit gradient must remain within a safe limit.

• A. Exit gradient
• B. Head loss
• C. Creep length
• D. Hydraulic gradient

Explanation: Hydraulic gradient is the loss of head per unit length of seepage or creep, expressed as H/L.

• A. Creep length
• B. Seeping length
• C. Piping
• D. Undermining

Explanation: Bligh called the distance travelled by seepage water along the contact or lower contour of a hydraulic structure the creep length.

• A. Reynolds
• B. Froude No
• C. Webber
• D. Darcy,s law

Explanation: The Froude number compares inertial and gravitational effects and determines the character and strength of a hydraulic jump.

• A. Water wave
• B. Water tide
• C. Hydraulic jump
• D. Afflux

Explanation: A hydraulic jump is the abrupt transition from shallow, high-velocity supercritical flow to deeper, low-velocity subcritical flow, with…

• A. High flood level
• B. Dangerous condition
• C. Hydraulic design condition
• D. Worst condition

Explanation: The combination of high flood discharge over the weir and no canal flow produces maximum uplift and is treated as the worst condition for…

• A. Head Regulator
• B. Cross-Regulator
• C. Escape
• D. All are correct

Explanation: A head regulator is placed at the entrance of an off-taking canal to control and supply its required discharge from the parent canal.

• A. River controlling works
• B. River Training works
• C. Marginal Embankment
• D. Guide Banks

Explanation: River training works are the group of structures used to guide, confine, and regulate river flow near hydraulic structures.

• A. Under sluices
• B. Head sluices
• C. Scouring sluices
• D. Sluice gates

Explanation: Under-sluices are also called scouring sluices because they pass sediment-laden water and scour deposits near the weir and approach…

• A. Pond level
• B. FSL
• C. HFL
• D. Canal level

Explanation: Pond level is the upstream water level maintained at a canal head regulator to provide the required head for the canal to draw its…

• A. Afflux
• B. Hydraulic jump
• C. Pond level
• D. HFL

Explanation: The downstream glacis is shaped to create a hydraulic jump, which changes high-velocity flow into a deeper, slower flow and dissipates…

• A. Cippollite weir
• B. Broad crested weir
• C. Gravity weir
• D. Non-gravity weir

Explanation: A gravity weir is designed so its own weight resists and balances the uplift pressure produced by seepage beneath the weir.

• A. Permeable
• B. Impermeable
• C. repelling
• D. Attracting

Explanation: A groyne pointing downstream follows the direction of river flow and attracts the current toward the bank, so it is called an attracting…