Q. The recurrence interval (R.I.) of 20 cm rain storm at a place is 5 years.

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Q. Sharp crested weirs are generally used

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Q. The area of a drainage basin whose axial length is 100 km is 2500 sq. km. Its form factor is

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Q. If the axial length of a drainage basin is 35 km and its form factor is 0.2, the total area of the basin is

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Q. Run off is measured in

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Q. For efficient working of a control meter, its throat length is approximately kept

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Q. A control meter is preferred to a weir because

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Q. A river is said to be of uniform section if in its section

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Q. The run off is affected by

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Q. The form factor of a drainage basin is obtained by dividing

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Q. Isopiastic lines are the contours

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Q. The coefficients of permeability of soils of an unconfined aquifer and another confined aquifer were determined by pumping water from the wells and observing the effect of water table in two test wells at equal distances was found to be equal. The total height of confined aquifer H is given by

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Q. The radius of influence is

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Q. When a constant discharge 2.91 litres/sec. was obtained in a pumping test, the draw downs in the test wells at 3 m and 6.184 m were 2.6 m and 0.3 m respectively. If over-all depth of the pumping well was 16 m, the permeability of the soil, is

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Q. If h is the loss due to friction in a pipe. Total losses in strainer and bends may be taken as

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Q. If the loss due to friction in pipes is 4 m, the total losses in strainer and bends may be taken as

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Q. The rate of evaporation from reservoirs may be determined by

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Q. In estimating the rate of evaporation from the reservoir surface, a pan 1.5 metres in diameter, was filled upto 8.0 cm. During a specified period of time, the rainfall recorded was 5 cm. 3 cm of water was removed from the pan to keep the depth of water. At the end of the time, the depth was 9 cm. If the pan coefficient is 0.6, the evaporation loss is

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Q. Dicken's formula for high flood estimate, is useful only for the catchments in

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Q. Relative humidity is the ratio of actual vapour pressure to the saturation vapour pressure

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