1971. The stage of river carrying a discharge of Q m7sec at a point is 10 m and slope of water surface is (1/4000). The discharge of a flood at the same point and same stage of 10 m with a water surface slope of(l/1000) will be________________?

A. V2 Q m3/sec
B. 0.5 Q mVsec
C. 2 Q m3/sec
D. 4 Q m3/sec
✅ The correct answer is option C.

1973. Infiltration rate is always________________?

A. more than the infiltration capacity
B. less than the infiltration capacity
C. equal to or less than the infiltration capacity
D. equal to or more than the infiltration capacity
✅ The correct answer is option C.

1974. If it rains between 2 P.M. and 3 P.M. and the entire basin area just starts contributing water at 3 P.M. to the outlet, then time of concentration will be_____________________?

A. 15 minutes
B. 20 minutes
C. 30 minutes
D. 60 minutes
✅ The correct answer is option D.