Irrigation Engineering
Generally the weir is aligned at right angles to the direction of the main river current because

It ensures less length of the weir
All of these
It gives better discharging capacity
It is economical

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Irrigation Engineering
An artesian aquifer is the one where

water surface under the ground is at atmospheric pressure
water table serves as upper surface of zone of saturation
None of these
water is under pressure between two impervious strata

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Irrigation Engineering
A water-logged land is found suitable for cultivation due to

None of these
Absence of aeration of soil from root zone of the plant
Ease of tillage for preparation of the field for optimum condition of germination
Regular supply of water to plants from the water table by capillary action

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