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Water Resources Engineering problems

5. Pick up the correct statement from the following :
Options
A. Absolute humidity at a given temperature is equal to weight of moisture present in a unit volume
B. Relative humidity is the ratio of actual vapour pressure and saturation vapour pressure at the same temperature
C. Relative humidity is the ratio of the weight of the vapours present per unit volume to the weight of vapours which could be contained at the same temperature when fully saturated
D. Humidity can be measured by psychrometer
E. All the above.

6. Pick up the correct statement from the following :
Options
A. Rivers, lakes, oceans and springs get water from the rains
B. Rain water is obtained by evaporation from rivers, lakes and oceans
C. Water remains in atmosphere as vapours
D. Hydrologic cycle is a continuous process of evaporation and precipitation of water in atmosphere
E. all the above.

8. In the derivation of Thiem's formula , the following assumption is not applicable
Options
A. The aquifer is homogeneous and isotropic
B. Flow lines are radial and horizontal
C. The slope of the water surface is too small
D. The well has been sunk up to the surface of the unconfined aquifer
E. None of these.

10. With the usual meanings ofletters, the equation is used for determining the velocity of ground water flow in metres per day. It is known as
Options
A. Meinzer's formula
B. Slichter's formula
C. Darcy's formula
D. Hazen's formula.

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