AI3602 FLASHCARD 2

Front

Consider a field that requires an irrigation rate of 10 mm/day. The area of the field is 4 hectares, and the available water supply is 20 liters per second. What is the adequacy of the water supply to the field in terms of meeting the irrigation requirement?

Back

200%

Front

In lined canals, the increased velocity eliminates the possibility of silting in the canal bed. This is because: (a) The smooth and stable surface provided by canal lining increases the velocity of water flow, which helps in preventing silting by carrying sediment particles away, (b) The rough surface of unlined canals promotes sediment deposition, leading to reduced velocity and increased silting, (c) Lined canals have a steeper gradient, which increases the velocity of water flow, preventing sediment deposition., (d) Unlined canals allow water to seep into the surrounding soil, reducing the volume of water available for irrigation and promoting silting.

Back

The smooth and stable surface provided by canal lining increases the velocity of water flow, which helps in preventing silting by carrying sediment particles away.

Front

A temporary structure constructed in a river to exclude water from a given site to enable building operations to be performed on a dry surface is called:​

Back

Cofferdam

Front

In flexible module, the discharge depends upon: Inadequate drainage, Overirrigation, Impervious obstruction, All of these

Back

All of these

Front

A hydraulic jump is formed when: A supercritical flow strikes against a subcritical flow​, The two flows of supercritical velocities meet each other​, A subcritical flow strikes against a supercritical flow, The two flows of subcritical velocities meet each other

Back

A supercritical flow strikes against a subcritical flow​

Front

Canal irrigation is generally preferred in

Back

alluvial canal

Front

What is the Annual Intensity of irrigation (AII)?

Back

Gross Irrigated Area/Cultivable Command Area

Front

Which of the following is a remedial measure for water-logging? a) By lowering the F.S.L of the canals b) Quick disposal of rainwater c) Installation of lift irrigation systems d) Controlling seepage from the canals

Back

Installation of lift irrigation systems

Front

If the salt concentration of the irrigation water ranges from 0.5 – 2 g/L, then what is the restriction on its use?

Back

It should be used with appropriate water management practices.

Front

Which of the following policy was framed in India to reduce the losses? a) Water Law, b) Policy of Water, c) National Water Policy, d) Irrigation Water Policy

Back

National Water Policy