ক) a horizontal benching provided on the inside slope
খ) a horizontal benching provided on the outside slope
গ) a vertical benching provided on the outer edge of the bank
ঘ) a vertical benching provided on the inner edge of the bank.
০১। A current meter measures the velocity of flow, if it is held
ক) on the surface of water
খ) at the bottom of channel
গ) at any point within the cross-section
ঘ) none of these.
০২। A deficit of sediments in flowing water may cause a river
ক) meandering type
খ) aggrading type
গ) degrading type
ঘ) sub-critical type.
০৩। A fall in a canal bed is generally provided, if
ক) ground slope exceeds the designed bed slope
খ) designed bed slope exceeds the ground slope
গ) ground slope is practically the same as the designed bed slope
ঘ) none of these.
০৪। A fall which maintains its depth, is
ক) a trapezoidal notch fall
খ) a low weir fall
গ) a rectangular notch fall
ঘ) all the above.
০৫। A hydraulic jump is generally formed when a stream moving with
ক) a hyper-critical velocity meets a stream moving with a critical velocity
খ) a hyper-critical velocity meets a stream moving with a hyper-critical velocity
গ) A hyper-critical velocity meets a stream moving with a sub-critical velocity
ঘ) a sub-critical velocity meets a stream moving with a hyper-critical velocity.
০৬। A hydraulic structure is designed to withstand
ক) seepage forces
খ) hydraulic jump
গ) hydraulic pressure
ঘ) all the above.
০৭। A land is said to be water-logged if its soil pores within
ক) a depth of 40 cm are saturated
খ) a depth of 50 cm are saturated
গ) root zone of the crops are saturated
ঘ) all the above.
০৮। A minimum of 90 cm free board is provided if the discharge in the canal is between
ক) 30 to 33 cumecs
খ) 30 to 60 cumecs
গ) Over 60 cumecs
ঘ) Over 100 cumecs
০৯। A river is said to be of
ক) aggrading type if it builds up its bed to a certain slope
খ) degrading type if it cuts its bed to a certain slope
গ) meandering type if it flows in sinuous curve
ঘ) all the above.
১০। A river training work is generally required when the river is
ক) meandering
খ) aggrading
গ) degrading
ঘ) all the above.
১১। A water-logged land is found suitable for cultivation due to
ক) ease of tillage for preparation of the field for optimum condition of germination
খ) absence of aeration of soil from root zone of the plant
গ) regular supply of water to plants from the water table by capillary action
ঘ) none of these.
১২। According to Bligh‘s creep theory, percolating water flows along
ক) straight path under the foundation of the dam
খ) circular path under the foundation of the dam
গ) the outline of the base of the foundation of the dam
ঘ) none of these.
১৩। According to G.W. Pickles the effect of confining the flood water of a river between levee, is to increase
ক) rate of flood wave
খ) water surface elevation during floods
গ) maximum discharge
ঘ) velocity and scouring action
ঙ) surface slope of streams above the leveed portion.
১৪। 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).
ক)
খ)
গ)
ঘ)
১৫। According to Khosla, the exist gradient of surface flow
ক) depends upon the b/d ratio
খ) is independent of the b/d ratio
গ) is independent of the depths of d/s cut off walls
ঘ) none of these.
১৬। 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
ক) 1.25 D
খ) 1.50 D
গ) 1.75 D
ঘ) 2.00 D
১৭। According to Lacey, in regime conditions
ক) silt is kept in suspension by vertical components of eddies
খ) entire cross-section of the channel is generated at all points by the forces normal to the wetted perimeter
গ) both (a) and (b)
ঘ) neither (a) nor (b).
১৮। An outlet is said to be proportional if its flexibility, is
ক) zero
খ) less than one
গ) more than one
ঘ) one
১৯। An outlet which maintains a constant discharge irrespective of fluctuation in the water levels of the supplying channel or water course, is known as