water management Mcqs
251. Wilting point is that limit after that the crop starts feeding up and no water is available for plant, this point occurs after _________________?
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A. 25% water available

B. 30% water available

C. All are correct

D. 20% water available
252. That rain fall which is effectively consumed by the plants to meet its consumptive needs is called__________________?
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A. Total rainfall

B. Effective rain fall

C. Monsoon rainfall

D. All are correct

253. The most economical central angle of an arch dam is made at ___________________?
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A. 143

B. 133!

C. 123

D. 153

254. A flow in which the quantity of liquid flowing per second is constant is called___________________?
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A. Turbulent flow

B. Steady flow

C. None of these

D. Uniform flow

255. The ratio of the rate of change of discharge through out let to the rate of c./v of water level of the distributary is called_________________?
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A. Flexibility

B. Setting

C. Proportionally

D. Sensitivity
256. The depth before the jump is always less then the depth after the jump. The depth before the jump is called initial depth and depth after the jump is called_______________?
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A. Sequent depth

B. Final depth

C. Afflux

D. Down stream water depth

257. Those crops which increase the nitrogen content of the soil and hence the fertility also are called ___________________?
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A. Cash crops

B. Food crops

C. Leguminous crops

D. Fodder

258. Presently percentage of area irrigation to that of total cultivated area in our country is __________________?
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A. 40%

B. 27%

C. 60%

D. 80%

259. Mostly the hydraulic structures founded on ____________ soils fails because of undermining and uplift pressure?
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A. Permeable

B. Stable

C. Rocky

D. Impermeable

260. The discharge through a rectangular channel will be maximum. if its depth is_______________?
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A. Half of its width

B. Equal to its width

C. Twice the width

D. one-third of its with

261. The hydraulic mean depth for a circular pipe of diameter d is ____________________?
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A. d/4

B. d/3

C. d/2

D. d/6

262. Mean velocity of flow in a river can be directly measured by means of ______________________?
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A. Surface floats

B. Rod floats

C. Dicknes formula

D. Current meter

263. The piles driven in low bearing capacity soil which does not rest on hard rock but bears the coming load due to side resistance is called ________________?
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A. Load Bearing

B. Frictional pile

C. Cost-in situ piles

D. All are correct

264. A well penetrated in ground water confined between impervious layer at its top and bottom is called __________________?
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A. Perched

B. Non-artesian

C. Artesian well

D. Un-confined

265. The science of water which deals with the depletion and replenishment of water resources is called_________________?
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A. Biology

B. Histology

C. Hydrography

D. Hydrology
266. generally useful life of a reservoir is considered terminated when its -gross storage is reduced by _______________ of the design capacity of the reservoir?
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A. 80%

B. 100%

C. 50% l

D. 20%

267. Hydrology is the science which deals with the depletion and recharge of water resources yearly therefore. its knowledge is a must to _________________ properly the water resources?
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A. Develop

B. Remodel

C. Manage

D. Rehabilitate

268. The level above the or below the sea level which is also called zero level or datum is called ___________________?
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A. Positive level

B. Negative level

C. Soil level

D. Reduce level
269. A river before its joins the sea, gets divided into small channels, thus forming a Triangular shape called __________________?
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A. Degrading river

B. Stable river

C. Unstable river

D. Deltaic river
270. The rise in river water level at up stream due to construction of weir is called__________________?
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A. HFL

B. Pond level

C. Afflux

D. FSL

271. The ratio of change of discharge of an outlet to the rate of change in level of water surface in distributary at its normal depth is called ____________________?
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A. Flexibility

B. Flow ability

C. Durability

D. Sensitivity
272. Water logging is the state of the soil where the water table brought ______________capacity or root zone of plants?
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A. Below

B. Within

C. Near

D. Far from

273. A curve consisting two or more arcs of different radii curving in the same direction with common tangent is called ___________________?
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A. All are correct

B. Double curve

C. Composite curve

D. Compound curve
274. The sheet or small layer of water flowing over an ogee spillway is called _________________?
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A. Water sheet

B. Thin layer

C. Water spillway

D. Nappe
275. The water evaporates from paddy surfaces to the atmosphere in the form of water vapours, these water vapours get collected in the atmosphere and behave & like_________________?
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A. Gas

B. Ice particles

C. Water

D. Snow

276. The run-off from catchment areas, Roads, buildings and other fallow lands is called ____________________?
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A. Dry weather flow

B. Rain water

C. Storm water

D. Surface run-off

277. The wall of masonry or concrete, constructed at 90 to the axis of weir to separate normal weir from under sluices is called____________________?
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A. Retaining wall

B. Toe wall

C. All are correct

D. Divide wall
278. A flow in which the stream lines may be represented by a straight line is called____________________?
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A. one-dimension flow

B. Non-uniform flow

C. un-steady flow

D. steady flow

279. Khosla provided a seepage theory for design of Hydraulic structures called________________?
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A. Theory of seepage

B. Method of cutoffs

C. Creep theory

D. Method of independent variables
280. The field capacity is the water retained by a saturated soil after free drainage of surplus water to the ground water table but the water retained by a saturated soil after being centrifuged by a centrifugal force of 1000 times that of gravity is called________________?
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A. Available moisture

B. Field moisture

C. Soil moisture

D. Equivalent moisture
281. To protect the face of embankment against the attack of wave wash with stone boulders is called _________________?
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A. Armouring

B. Revetment

C. Pitching

D. All are correct

282. A series of vertical steps in a stream made to avoid soil scouring is called ___________________?
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A. Embankment

B. Banks

C. Cascades

D. Levees

283. Direct runoff is the sum of __________________?
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A. Surface run off and flow

B. Sub-surface run off and deep percolation

C. Surface run-off and mass flow

D. Bass flow and ground water run off

284. The mercury in a glass tube assumes convex shape at the top because of_________________________?
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A. Adhesion

B. Surface Tension

C. Viscosity

D. Cohesion

285. Water logging caused by ____________ water, which during excessive irrigation percolates down and join under ground water table?
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A. Hygroscopic

B. Capillary

C. Gravity

D. Free

286. A water rise takes place on down stream of sloping glacis, when a stream of water moving with high velocity and low depth strikes another stream of flow moving with low velocity and high depth, such breakage in water surface is called______________?
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A. Water tide

B. Hydraulic jump

C. Afflux

D. Water wave

287. The free distance on the paddy surface which a wind can travel to any point to rise waves is called_________________?
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A. Wave wash

B. Tide

C. Wave amplitude

D. Fetch
288. The groyne pointing downwards in the direction of flow in fiver is called________________?
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A. Attracting

B. repelling

C. Permeable

D. Impermeable

289. A hydraulic jump to dissipate energy when flow is __________________?
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A. Turbulent flow

B. Shooting flow

C. Critical flow

D. Streaming flow