If the height of the hydraulic gradient line above the floor of thickness t is h and the specific gravity of the material of the floor is G, the minimum thickness t of the floor downstream of the crest-wall, is given by the equation

Irrigation Engineering
If the height of the hydraulic gradient line above the floor of thickness t is h and the specific gravity of the material of the floor is G, the minimum thickness t of the floor downstream of the crest-wall, is given by the equation

t = (h - 1)/(G + t)

t = (h + 1)/G

t = (h - 1)/(G - t)

t = (h + 1)/(G + t)

t = (h - 1)/(G + t)

t = (h + 1)/G

t = (h - 1)/(G - t)

t = (h + 1)/(G + t)

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Irrigation Engineering
Groynes are generally built

All listed here

Perpendicular to the bank

Inclined downstream up to 30°

Inclined up stream up to 30°

All listed here

Perpendicular to the bank

Inclined downstream up to 30°

Inclined up stream up to 30°

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Irrigation Engineering
A river training work is generally required when the river is

Aggrading

All of these

Degrading

Meandering

Aggrading

All of these

Degrading

Meandering

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Irrigation Engineering
Under the same conditions, which of the following shapes of water surface will give the highest rate of evaporation ?

convex water surface

flat water surface

concave water surface

independent of shape of water surface

convex water surface

flat water surface

concave water surface

independent of shape of water surface

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Irrigation Engineering
To control the silt entry into a distributary at head regulator, King's vanes are provided which are the walls

All listed here

Of height ⅓rd to ¼th the depth of water in the main canal

Of R.C.C. or steel plate 8 cm thick

Spaced at interval of 1½ times their heights

All listed here

Of height ⅓rd to ¼th the depth of water in the main canal

Of R.C.C. or steel plate 8 cm thick

Spaced at interval of 1½ times their heights

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Irrigation Engineering
A deep well

both (A) and (B)

has more discharge than a shallow well

is weaker structurally than a shallow well

is always deeper than a shallow well

both (A) and (B)

has more discharge than a shallow well

is weaker structurally than a shallow well

is always deeper than a shallow well

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Irrigation Engineering

Irrigation Engineering If the height of the hydraulic gradient line above the floor of thickness t is h and the specific gravity of the material of the floor is G, the minimum thickness t of the floor downstream of the crest-wall, is given by the equation

Irrigation Engineering Groynes are generally built

Irrigation Engineering A river training work is generally required when the river is

Irrigation Engineering Under the same conditions, which of the following shapes of water surface will give the highest rate of evaporation ?

Irrigation Engineering To control the silt entry into a distributary at head regulator, King's vanes are provided which are the walls

Irrigation Engineering A deep well

Irrigation Engineering
If the height of the hydraulic gradient line above the floor of thickness t is h and the specific gravity of the material of the floor is G, the minimum thickness t of the floor downstream of the crest-wall, is given by the equation

Irrigation Engineering
Groynes are generally built

Irrigation Engineering
A river training work is generally required when the river is

Irrigation Engineering
Under the same conditions, which of the following shapes of water surface will give the highest rate of evaporation ?

Irrigation Engineering
To control the silt entry into a distributary at head regulator, King's vanes are provided which are the walls

Irrigation Engineering
A deep well