Water Management MCQs with Answers | Agriculture – Page 5

Question 81 Water Management

According to Khosla, in which direction does undermining caused by seeping water progress?

Correct answer D. Downstream to upstream

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Question 82 Water Management

To keep a hydraulic structure safe against undermining, which quantity must be kept within safe limits?

Correct answer A. Exit gradient

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Question 83 Water Management

Head loss H/L is proportional to creep length. What is the loss of head per unit creep length called?

Correct answer C. Hydraulic gradient

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Question 84 Water Management

According to Bligh, what is the length travelled by percolating water as it seeps along the base contour of a hydraulic structure called?

Correct answer B. Creep length

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Question 85 Water Management

A hydraulic jump forms downstream of the toe of a glacis to dissipate surplus energy. Which number governs the nature and strength of the jump?

Correct answer A. Froude number

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Question 86 Water Management

When a fast, shallow stream of water on the downstream side of a sloping glacis meets a slow, deep stream, the water surface rises abruptly. What is this called?

Correct answer B. Hydraulic jump

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Question 87 Water Management

What is the design condition called when a high flood passes over a weir, creating high uplift pressures while the canals carry no flow?

Correct answer C. Worst condition

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Question 88 Water Management

What is the water-control structure at the head of a canal that supplies water from the parent canal to a branch channel called?

Correct answer C. Head Regulator

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Question 89 Water Management

What are the works built along a river to guide its flow and pass it safely through hydraulic structures called?

Correct answer C. River training works

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Question 90 Water Management

What are the sluices provided at upstream floor level in a weir to flush out deposited sediment called?

Correct answer C. Scouring sluices

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Question 91 Water Management

What is the water level needed on the upstream side of a canal head regulator to feed the off-taking canal with its full supply called?

Correct answer A. Pond level

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Question 92 Water Management

The downstream sloping glacis of a hydraulic structure is designed to form what automatically and dissipate the surplus energy of flowing water?

Correct answer B. Hydraulic jump

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Question 93 Water Management

What is a weir called whose own weight balances the uplift pressure from water seeping beneath its floor?

Correct answer B. Gravity weir

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Question 94 Water Management

What is a groyne pointing downstream, in the direction of river flow, called?

Correct answer C. Attracting

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Question 95 Water Management

In an alluvial river, centrifugal force causes scouring on the concave bank and silting on the convex bank, developing bends. What is this process called?

Correct answer D. Meandering

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Question 96 Water Management

What is a river whose floods rise and fall suddenly after storm rain called?

Correct answer B. Flashy

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Question 97 Water Management

What is a river called that does not significantly change its alignment, slope or regime?

Correct answer B. Stable river

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Question 98 Water Management

What is the area irrigated in a year that grows crops on which water rates are levied called?

Correct answer B. Area Assessed

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Question 99 Water Management

What is a flood that exceeds the design magnitude of a reservoir called?

Correct answer A. Standard project flood

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Question 100 Water Management

A unit hydrograph is the runoff hydrograph from a rainstorm of a specified duration. What is that duration called?

Correct answer A. Unit duration

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