The consumptive use of water for a crop

Canals taken off from ice-fed perennial rivers, are known

In gravity canals, F.S.L. is

The field capacity of a soil is 25%, its permanent wilting point is 15% and specific dry unity weight is 1.5. If the depth of root zone of a crop, is 80 cm, the storage capacity of the soil, is

If water table is comparatively high, the irrigation canal becomes useless, due to

If A is the area of the surface, x is the depth of its C.G. from the surface of the water and u is the density of water, then

In a syphon aqueduct

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

To hold hydraulic jumps, baffle walls are provided in

Pick up the correct sequence of the part of a canal system from the following

The field capacity of a soil depends upon

The water face of the guide banks, is protected by

Pick up the correct statement from the following

For a unique design of a channel by Kennedy’s theory

The structure constructed to allow drainage water to flow under pressure through an inverted syphon below a canal, is called

The main cause of silting up a channel,

Pick up the correct statement from the following:

A river training work is generally required when the river is

When a canal flowing under pressure is carried below a natural drainage such that its F.S.L. does not touch the underside of the supporting structure, the structure so provided, is called

Pick up the correct statement from the following

In a Sarda type fall, the rectangular crest, may be used for discharge upto

The measure to remove water logging of land, is

Borrow pits should preferably be located in

The sinuosity of a meander is the ratio of

Pick up the correct statement from the following:

According to Khosla, the exits gradient of surface flow

A hydraulic structure is designed to withstand

If the optimum depth of kor watering for a crop is 15.12 cm, the outlet factor for the crop for four week period in hectares per cumec, is

In Montague type fall

Cross regulators in main canals are provided

According to Lacey, depth of scour in a river depends upon the straightness of the reach. If D is the depth of scour in regime flow in a right angled bend, it is

According to Lacey, in regime conditions

The most suitable section of a lined canal, is

An outlet is said to be proportional if its flexibility, is

The level of the floor of a syphon aqueduct can be obtained

If the straight sides of a triangular section of a lined canal with circular bottom of radius D, make an angle 0 with horizontal, the hydraulic mean depth is

According to Bligh’s creep theory, percolating water flows along

For a standing crop, the consumptive use of water is equal to the depth of water

Bed bars in a canal are provided

The velocity of drainage water in the barrels of a syphon-aqueduct, is normally limited to

For the design of major hydraulic structures on the canals, the method generally preferred to, is based on

Pick up the incorrect statement from the following:

Pick up the incorrect statement from the following

Irrigation canals are generally aligned along

In a canal syphon, the flow is

Pick up the correct statement from the following

The main function of a diversion head works of a canal from a river, is

Pick up the correct statement from the following:

If d1 is the depth of cutting, d2 is the height of the bank from bed level r2 : 1 and r1 : 1 are the slopes in filling and cutting respectively, the horizontal distance n between the bed and bank, is

If V0 is the critical velocity of a channel, its silt transporting power, according to Kennedy, is proportional to

Regime conditions in a channel may occur if

A river is said to be of

The ratio of the rate of change of discharge of an outlet and parent channel, is known as

The width of a dowla is generally kept between 30 to 60 cm and its height above the road level should invariably be more than

Pick up the correct statement from the following:

Lacey’s equation for calculating flood discharge in rivers, is

A deficit of sediments in flowing water may cause a river

Side slopes generally kept for canals in loam soil, are:

For the stability of a structure against seepage pressure according to Khosla’s creep theory, the critical gradient is

If B and d are the bed width and depth of a channel in metres, the combined losses due to evaporation and seepage in cumecs per kilometre length of the channel, is

The length of a meander is the distance along the river between the tangent point of one curve to the tangent point of

The top of the capillary zone

The depth of rice root zone, is

If the irrigation efficiency is 80%, conveyance losses are 20% and the actual depth of watering is 16 cm, the depth of water required at the canal outlet, is

In a barrage, the crest level is kept

An outlet which maintains a constant discharge irrespective of fluctuation in the water levels of the supplying channel or water course, is known as

In case of a trapezoidal notch fall

Finally formed berms in canals are provided for

Process of meandering is due to

The ratio of the rate of change of discharge of an outlet to the rate of change in level of water surface in a distributary at its normal depth, is known as

The ratio of the head recovered to the head put in, is known as

If H and d are the water depth and drop in the bed level at a Sarda fall, the width B of the trapezoidal crest, is given by

The scour depth D of a river during flood, may be calculated from the Lacey’s equation

For the conditions enumerated to provide a crossing at C1 You will probably provide

When a canal and a drainage approach each other at the same level, the structure so provided, is

The difference in level between the top of a bank and supply level in a canal, is called

If L is total length of a canal in kilometres, P is total perimeter of its lining in metres and C is the cost of lining per square metre, the additional expenditure involved on lining, is

The crest level of a canal diversion head work, depends upon

The most suitable location of a canal head work, is

The length and width of a meander and also the width of the river, vary roughly as

A land is said to be water-logged if its soil pores within

V’ and ‘R are the regime mean velocity and hydraulic mean depth respectively in metres. Lacey’s silt factor ‘f’ is

A counter berm is

While deciding the alignment of a proposed canal taking off from a river at B, three alignments of approximately equal lengths are available. These cross a drainages at C1, C2and C3 where drainage bed levels C1 > C2 > C3, you will provide at site C3

Canals constructed for draining off water from water logged areas, are known

The Lacey’s regime velocity is proportional to

A fall in a canal bed is generally provided, if

If the straight sides of a triangular section of a lined canal with circular bottom of radius R, make an angle 6 with horizontal, the perimeter of the canal is

According to G.W. Pickles the effect of confining the flood water of a river between levee, is to increase

F.S.L. of a canal at its head with respect to parent channel is kept

The depth of the crest of a scouring sluice below the crest of a head regulator, is generally kept

Bligh’s theory of seepage assumes

If D1 and D2 are depths of water upstream and downstream of a hydraulic jump, the loss of head at the jump, is

Garnett’s diagrams are used for graphical solution of design equations of a canal by

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

Effective precipitation for a crop may be defined as

If straight sides of a triangular section of a lined canal with circular bottom of radius R, make an angle θ with horizontal, the area of its cross-section, is

The state of the soil when plants fail to extract sufficient water for their requirements, is

The useful moisture of soil, is equal to its

Groynes are generally built

Useful soil moisture for plant growth, is

A minimum of 90 cm free board is provided if the discharge in the canal is between

According to Kennedy, the critical velocity (V0) in metres in a channel is the mean velocity which keeps the channel free from silting or scouring. Its value is given by (where m is critical velocity ratio and D is the depth of the channel).

For diversion of flood water of rivers, the type of canal constructed, is

Lane’s weighted creep theory assumes

Solution of Laplacian equation in three dimensions dzф/dx2 + d2ф/dy2 + dzф/dz2 = 0 of water in a syphon, is done by

In north Indian Plains, optimum depth of kor watering for wheat, is

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

Attracting groynes are built

The optimum depth of kor watering for a rice crop, is

Which one of the following statements is correct?

For cereal crops the most commonly adopted method of irrigation, is

If D is the depth of water upstream of the throat above its sill, B is the width of the throat, to achieve critical flow in an open venturi flume, the theoretical maximum flow Q, is

The intensity of irrigation means

Retrogression of the bed level of a river downstream a weir, occurs due to

Meandering of a river generally occurs, in

For designing the venturi head,

Disposal of extra excavated earth of canals, is utilised to provide a spoil bank on

In a concrete canal the approximate permissible velocity of water should not exceed

Lacy’s regime condition is obtained if

A hydraulic jump is generally formed when a stream moving with

Pick up the incorrect statement from the following. Culturable commanded area is the gross area of an irrigation canal system less

The downstream expansion head of a guide bank is extended to subtend an angle at the centre, equal to

A fall which maintains its depth, is

A current meter measures the velocity of flow, if it is held

The width of a meander belt is the transverse distance between

When a canal is carried over a natural drainage, the structure provided, is known as

For smooth entry of water in a canal, the angle between head regulator and water is generally kept

In rigid module, the discharge

For standing crops in undulating sandy fields, the best method of irrigation, is

The saturation line is the line up to which banks get saturated after the canal runs for some time. The saturation gradient in ordinary loam soil, is generally

Fundamental momentum equation for a hydraulic jump, is

The uplift pressure on the roof of an inverted syphon, is maximum when

The ratio of the discharge over a trapezoidal crest to a rectangular crest of Sarda falls of identical parameters, is

If A is the depth of water in metres, B is the number of days of base period and D is the duty in hectare/cumec, the relationship which holds good, is

The top soil of a water logged field becomes more alkaline and infertile if its pH value is

If average particle size of the silt in millimetres is m, the Lacey’s silt factor f is proportional to

The sensitivity of a rigid module, is