1. Runoff increases with
[A] increase in the infiltration capacity
[B] increase in intensity of rain
[C] increase in permeability of soil
[D] decrease in the porosity of soil
Answer: Option B
2. Drainage density is the
[A] average length of the streams per unit drainage area within the basin
[B] stream discharge per unit drainage area
[C] annual runoff per unit drainage area
[D] number of streams per unit drainage area
Answer: Option A
3. The basic assumptions of the unit hydrograph theory are
[A] nonlinear response and time invariance
[B] time invariance and linear response
[C] linear response and linear time variance
[D] nonlinear time variance and linear response
Answer: Option B
4. The statement “ordinate of the direct run off hydrographs of a common base period are directly proportional to the volumes of runoff represented by the respective hydrograph” infers
[A] principle of linearity
[B] principle of time invariance
[C] principle of uniformity
[D] none of these
Answer: Option A
5. Base flow separation is used in connection with
[A] Seepage flow
[B] Infiltration
[C] Evaporation
[D] Stream flow
Answer: Option D