A. Piping
B. Under mining
C. Up thrust
D. a and b are correct
Correct Answer: a and b are correct ✔
Last Updated: March 29, 2019
Related MCQs
- Khosla provided a seepage theory for design of Hydraulic structures called__________?
- According to Mr. Khosla, the seeping water creates undermining and the undermining starts from__________?
- To keep the Hydraulic structure safe against undermining the __________ should be safe?
- The loss of head H/ L is proportional to the length of creep. There fore the loss of head per unit creep length is called __________?
- According to Blight, the percolating water seeps along the lower contour of the hydraulic structure, the length traversed by this water is called __________?
- The hydraulic jump is formed on down stream of toe of glacis for the purpose to dissipate surplus energy of the flowing water, the nature and strength of jump depends upon a Number called__________?
- 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__________?
- When high flood passing down weir creating high up lift pressures and there is no flow in the canals, if such condition is taken for design and is called__________?
- A regulator is water controlling structure, it is provided at the head of canal to supply water from parent canal to the branch channel is called__________?
- The various works constructed on river side to control the flow and pass it safely from hydraulic structures are called __________?
- The under sluices in a weir are provided, at the level of upstream floor dispose off the sediment deposited on downstream is called__________?
- The water level required on the upstream side of a canal head regulator, so as to feed the off-taking canal with its full supply is called__________?
- The down stream sloping glacis of the Hydraulic structure is made in such a way to form automatically the __________ and dissipate the surplus energy of flowing water?
- When the weight of weir balances the up lift pressure caused by the head of the water seeping below the weir bed is called __________?
- The groyne pointing downwards in the direction of flow in fiver is called__________?
- In alluvial river due to the action of centrifugal force, bends are developed by scouring on concave and silting on convex __________?
- If in a river the flood rises and falls suddenly due to storm rain, then such river is called __________?
- A river which does not change its alignment – slope and its regime significantly is called__________?
- The area irrigated in the year and it grows crops on which water rates are leveled is called__________?
- The floods which exceeds the designed magnitude of a reservoir is called __________?
- A unit hydrograph is a hydrograph of runoff produced by a rainstorm of a specified duration called __________?
- Pilot tube is a device, which convert velocity head of flowing water into pressure by __________?
- The ratio between the actual pressure and saturation vapour present at same temperature is called__________?
- The difference between saturation vapour pressure and actual vapour pressure at a constant temperature is called __________?
- The water vapours are generally present in a atmosphere, some times isolated and sometimes mixed with other gases. in such a situation the pressure exerted by each component of mixture, will be called __________?
- A curve showing the maximum flow in the river and mean time reduces flow. we be called__________?
- When seepage water after passing the ground water aquifer joins the surface stream, such stream will be called__________?
- Infiltration capacity curve is the graphical representation, as to how the infiltration capacity varies with time after rainfall this curve was represented by __________?
- 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__________?
- After rainfall the quantity of water that flows directly over the ground surface and join immediately to the river is called__________?
- 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?
- A curve consisting two or more arcs of different radii curving in the same direction with common tangent is called __________?
- That point in a body at which it will balance if loaded or supported is called __________?
- A graph which shows the volume of a reservoir or tank at any given water level is called __________?
- The Indus plain is the main agricultural producing region in the country which receives about__________m m of rain fall annually?
- A water flow available in the drains without irrigation season i.e.flow of sanitary sewage is called__________?
- If E1 is the energy before the hydraulic jump and E2 is the energy after the hydraulic jump the efficiency of jump is then given by __________?
- The water particles held in soil pores of root zone by __________ against gravity and is known as capillary water?
- Water logging is the state of the soil where the water table brought __________capacity or root zone of plants?
- According to Kennedy’s silt theory , the critical velocity is directly proportional to depth of flow __________?
- Canals normally excavated directly from river without head regulator is called__________?
- The discharge carrying capacity of an irrigation channel depends upon __________?
- The stability analysis of earth dam founded on cohesion less silt material be made against__________?
- The lower limit of factor of safety against over turning in a gravity is __________?
- the ratio between the rate of change of discharge of the out let to the rate of change of discharge of the distributary is called __________?
- According to Khosla’s theory of seepage, the Exit gradient depends upon __________?
- A fixed reference point from which the discharge of flowing water is measured is__________?
- A well penetrated in ground water confined between impervious layer at its top and bottom is called __________?
- The unit of volume of water used in irrigation practice in FPS system is Acre-Foot. there fore one Acre- Foot is equal to __________?
- The soil which are formed due to the weathering effects particularly by movement of water and are high permeable are called __________?
- That rain fall which is effectively consumed by the plants to meet its consumptive needs is called__________?