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
water is under pressure between two impervious strata
None of these

ANSWER DOWNLOAD EXAMIANS APP

Irrigation Engineering
For designing the venturi head,

Minimum throat width should not be less than 60 cm
Width of the throat should not be less than one-third of the bed width of main canal
Length of the throat should be 2.5 times the depth measured to F.S.L. in the main canal
All listed here

ANSWER DOWNLOAD EXAMIANS APP