1882. The unit hydrograph due to a storm may be obtained by dividing the ordinates of the direct runoff hydrograph by_______________?

A. direct runoff volume
B. period of storm
C. total rainfall
D. none of the above
✅ The correct answer is option A.

1887. A multipurpose reservoir is the one which is_________________?

A. designed for one purpose but serves more than one purpose
B. planned and constructed to serve various purposes
C. both (A. and (B.
D. none of the above
✅ The correct answer is option B.

1890. Irrigation water having the concentration of Na++ , Ca++ and Mg++ as 20, 3 and 1 Milli equivalent per litre respectively will be classified as__________________?

A. low sodium water
B. medium sodium water
C. high sodium water
D. very high sodium water
✅ The correct answer is option B.