# Civil Engineering - Water Resources Engineering

### Exercise :: Water Resources Engineering - Section 1

11.

Pick up the correct statement from the following :

 A. The portion of pellicular water which remains unutilised, is called hygroscopic water B. The moisture content at which permanent wilting of plants takes place, is called the wilting point C. The path of the water required to bring the soil moisture content of a soil up to its field capacity is called soil moisture deficiency D. The moisture deficiency will be different at different points E. All the above.

Explanation:

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12.

The main factor which affects the infiltration capacity, is

 A. thickness of saturated layer B. depth of surface detention C. soil moisture D. all the above.

Explanation:

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13.

According to Robert E. Horton, the equation of infiltration capacity curve, is (where letters carry their usual meanings)

 A. f = fc (fo - fc) ekt B. f = ft - (fo - fc) e-kt C. f = ft + (fo - fc) e-kt D. f = f + (fo - fc) ekt

Explanation:

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14.

Pick up the correct statement from the following :

 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.

Explanation:

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15.

Absolute humidity in air

 A. decreases at higher altitudes B. increases at higher altitudes C. remains constant at all altitudes D. none of these.