Water Management MCQs with Answers | Agriculture – Page 2

Question 21 Water Management

What is the process of washing salts out of the root zone by applying canal water called?

Correct answer C. Leaching

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Question 22 Water Management

Waterlogging and soil salinity are twin menaces that have badly affected agriculture. About how many hectares of land are lost each year?

Correct answer C. 40,000

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Question 23 Water Management

What is a series of vertical steps built in a stream to prevent soil scouring called?

Correct answer C. Cascades

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Question 24 Water Management

What is the ratio of the force causing a body to slide along a plane to the force normal to the plane called?

Correct answer C. Coefficient of friction

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Question 25 Water Management

What is the science of water that deals with the depletion and replenishment of water resources called?

Correct answer A. Hydrology

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Question 26 Water Management

What is the maximum rate at which a soil in a given condition can absorb water called?

Correct answer A. Infiltration capacity

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Question 27 Water Management

Field capacity is the water a saturated soil holds after gravity drainage. What is the amount of water needed to bring soil moisture up to field capacity called?

Correct answer D. A and B are correct

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Question 28 Water Management

At the start of rainfall, when soil moisture in the root zone is very low, how does the rate of infiltration behave?

Correct answer D. Increases

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Question 29 Water Management

Artificial rain tests are sometimes carried out to mimic actual field conditions more closely. What instrument is used?

Correct answer C. Rain simulator

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Question 30 Water Management

During a river’s peak stage, water flows from the river into the groundwater reservoir. What is the river called in this case?

Correct answer C. Influent stream

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Question 31 Water Management

Water evaporating from paddy fields collects in the atmosphere as water vapour. How does this vapour behave?

Correct answer A. Gas

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Question 32 Water Management

When the atmosphere is fully saturated with water vapour, what is the pressure exerted by the vapour in that air called?

Correct answer A. Saturation pressure

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Question 33 Water Management

What is the moisture content of air called when it is expressed as weight per unit volume?

Correct answer D. Absolute Humidity

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Question 34 Water Management

A cloud forms by condensation and consists of small ice particles and water droplets. About what diameter in microns are these droplets?

Correct answer C. 40

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Question 35 Water Management

What is the percentage of the culturable commanded area irrigated during the year, relative to the total culturable commanded area of an outlet or channel, called?

Correct answer C. Annual Intensity

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Question 36 Water Management

Hydraulic structures are designed to pass floods safely. What is the flood of design magnitude expected during the project’s life called?

Correct answer D. Probable flood

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Question 37 Water Management

What is the flood that could occur in a basin under the worst possible meteorological and hydrological conditions called?

Correct answer D. Maximum probable flood

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Question 38 Water Management

What is a river called that is depositing sediment and building up dunes in its bed?

Correct answer A. Aggrading river

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Question 39 Water Management

What is a river called that splits into small channels forming a triangular shape before it enters the sea?

Correct answer D. Deltaic river

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Question 40 Water Management

What is a river called whose flood water dries up before it reaches the sea or another river?

Correct answer C. Virgin

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