Free Irrigation and Water Management MCQs with Answers
262 Irrigation and Water Management MCQs from Agriculture, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
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262 questions · page 11 of 14
- A. Shooting flow
- B. Normal flow
- C. Sub-critical flow
- D. Critical flow
Explanation: Critical flow occurs when the specific energy, comprising depth-related and velocity-related energy for a given discharge, reaches its…
Correct answer: Critical flow- A. 70 cm
- B. 80 cm
- C. 90 cm
- D. 100 cm
Explanation: For irrigation planning, rice is commonly assigned an effective root-zone depth of about 90 cm.
Correct answer: 90 cm- A. 10 mm diameter
- B. 5 mm diameter
- C. 15 mm diameter
- D. 20 mm diameter
Explanation: Hail is solid precipitation made of ice balls or lumps exceeding about 5 mm in diameter, produced through repeated freezing and melting in…
Correct answer: 5 mm diameter- A. Pilot tube
- B. Manometer
- C. Piezometer
- D. All are correct
Explanation: A piezometer is a small tube connected to the side of a conduit, allowing the pressure head to be measured from the height of the water…
Correct answer: Piezometer- A. Hurricane
- B. Convective
- C. Orographic
- D. Cyclonic
Explanation: Cyclonic precipitation develops around moving low-pressure systems and their associated fronts, where air is forced to rise and condense.
Correct answer: Cyclonic- A. Water pressure
- B. Self weight of the dam
- C. Uplift pressure
- D. All the above
Explanation: A gravity dam resists water pressure and other destabilizing forces primarily through its large self-weight, which produces stability…
Correct answer: Self weight of the dam- A. Mountainous stage
- B. trough stage
- C. Delta stage
- D. Sub-mountainous stage
Explanation: The delta stage is the lower, final course of a river near its mouth, where the channel becomes flatter and the river deposits sediment…
Correct answer: Delta stage- A. 0.6m
- B. 0.5m
- C. 0.6 depth
- D. 0.5 depth
Explanation: In a sufficiently deep canal or channel, measuring velocity at 0.6 of the total depth below the water surface gives a practical…
Correct answer: 0.6 depth- A. Low pressure
- B. Low discharge
- C. High velocity
- D. High pressure
Explanation: Cavitation begins when local pressure falls below the liquid’s vapour pressure, causing vapour bubbles that later collapse and damage…
Correct answer: Low pressure- A. Always expands until it fills any container
- B. Is partially incompressible
- C. Can not remain at rest under the action of any shear force
- D. Can not be subjected to shear force
Explanation: A fluid continuously deforms and therefore cannot remain at rest when any finite shear stress is applied.
Correct answer: Can not remain at rest under the action of any shear force- A. Dicken's formula
- B. Ryve's formula
- C. Inglis formula
- D. Nawab Jung Bahadur All formula
Explanation: Nawab Jung Bahadur All’s formula is an empirical flood-discharge formula used for hilly catchments.
Correct answer: Nawab Jung Bahadur All formula- A. Gravity dam
- B. Arch dam
- C. Buttress dam
- D. Coffer dam
Explanation: A gravity dam resists overturning and sliding mainly through its own weight, which balances the water pressure and uplift forces.
Correct answer: Gravity dam- A. Free space
- B. Free board
- C. Free faced
- D. Free end -
Explanation: Freeboard is the vertical distance between the normal water level and the top of a dam or canal bank.
Correct answer: Free board- A. Stream lines
- B. Streak lines
- C. Equilibrium lines
- D. Equipotential lines
Explanation: Equipotential lines join points having equal hydraulic head or pressure.
Correct answer: Equipotential lines- A. Darcy's law
- B. Archimed's principle
- C. Permeability law
- D. Thiem's law
Explanation: Darcy’s law states that seepage discharge increases with hydraulic-head loss and flow area, but decreases as the length of the soil sample…
Correct answer: Darcy's law- A. Gradient
- B. Contour gradient
- C. Contour line
- D. Counter interval
Explanation: A contour gradient is a line laid out between points having a specified and constant slope, usually by using contour information.
Correct answer: Contour gradient- A. Chartered Engineer
- B. Irrigation Engineer
- C. Consulting Engineer
- D. All are correct
Explanation: A consulting engineer is engaged by a client to investigate, design or advise on structures such as dams, barrages and regulators.
Correct answer: Consulting Engineer- A. Shear friction factor Is less than 1.5
- B. Resultant of all forces cuts the base at the inner middle third point
- C. Ratio of over turning moments exceeds than unity
- D. Resultant of all forces cuts the base of the dam out side the toe
Explanation: Sliding becomes unsafe when the factor of safety against sliding falls below the prescribed value, commonly 1.5 for a gravity dam.
Correct answer: Shear friction factor Is less than 1.5- A. 120cm
- B. 100cm
- C. 80cm
- D. 70cm
Explanation: Delta is the total depth of irrigation water required by a crop during its entire crop period, from sowing to harvest.
Correct answer: 120cm- A. 100cm
- B. 120cm
- C. 80cm
- D. 75cm
Explanation: For rice, the conventional delta, or total depth of water consumed from the first watering until maturity, is approximately 120 cm.
Correct answer: 120cm