Pick up the correct statement from the following : The specified duration of uni

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Question
Pick up the correct statement from the following :
Options
A. The specified duration of unit hydrograph, is called unit duration
B. The rain during specified duration, is called unit storm
C. A unit hydrograph for a particular unit duration may be utilised for evaluating the run off hydrographs of other storms of like durations
D. The number of unit hydrographs for a given basin, is theoretically infinite
E. All the above.

Correct Answer

All the above.

Water Resources Engineering problems

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1. The rate of rainfall for successive 10 minute periods of a 60 minute duration storm, are shown in the below figure. If the value of ?_index is 3 cm/hour, the run off will be
Options
A. 2 cm
B. 3 cm
C. 4 cm
D. 5 cm.

3. Pick up the correct statement from the following :
Options
A. The throat of the section of a control meter is either rectangular or trapezoidal
B. The floor of the control meter throat is almost level
C. The floor of the expanding outlet of the control meter is given a steep slope
D. A properly designed control meter is associated with the phenomena of hydraulic jump
E. All the above.

4. Pick up the incorrect statement from the following :
Options
A. At two meteorologically homogeneous stations, the average annual precipitation is same
B. If the average annual precipitation at two places is same these are meteorologically homogeneous stations
C. Neither (a) nor (b)
D. Both (a) and (b).

5. The equation which is used for determining the velocity of ground water flow in metres per day is known as
Options
A. Meinzer's formula
B. Slichter's formula
C. Darcy's formula
D. Hazen formula.

6. If total run off of a basin of 50 hectares is 0.8 cm, the ordinate of Bernard's distribution graph, may be calculated by the formula (where Q is the discharge in cumecs at the given time)
Options
A. y = 50 Q
B. y = 100 Q
C. y = 150 Q
D. y = 200 Q
E. y = 250 Q

7. A well is sunk in an unconfined aquifer having a saturated depth of 100 m. Assuming the equilibrium flow conditions and a homogeneous aquifer and radius of influence to be same, the ratio of discharges at 20 m and 40 m draw downs, is
Options
A. 2/3
B. 5/4
C. 4/5
D. 7/8
E. 8/7

8. Pick up the correct statement from the following :
Options
A. A confined bed of impervious material laid over an acquifer, is known as an aquiclude
B. The top most water bearing strata having no acquifer, is known as non-artesion acquifer
C. The ordinary gravity wells which supply water from the top most water bearing strata, are called water table wells
D. A permeable stratum which is capable to yield appreciate quantities of ground water, is known as an aquifer
E. All the above.

9. Discharge curve may be extended by logarithmic method if
Options
A. cross section of river is uniform
B. river is broader and shallower
C. river is of any type
D. none of these.

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