A unit hydro graph has one unit of_______________?

Related Mcqs:

1. For a catchment area of 120 km2, the equilibrium discharge in m3/hour of an S-curve obtained by the summation of 6 hour unit hydro graph is_______________?

   A. 0.2 x 106
   B. 0.6 x 106
   C. 2.4 xlO6
   D. 7.2 xlO6

2. The best unit duration of storm for a unit hydrograph is________________?

   A. 1 hour
   B. one-fourth of basin lag
   C. one-half of basin lag
   D. equal to basin lag

3. For supplying water to rabi crop, kharif crop and sugarcane, the channel is designed for a capacity equal to the greater of the water requirement of_______________?

   A. rabi or kharif
   B. rabi and kharif or sugarcane
   C. rabi and sugarcane or kharif and sugarcane
   D. rabi or kharif or sugarcane

4. Trap efficiency of a reservoir is a function of_______________?

   A. capacity/inflow ratio
   B. capacity/outflow ratio
   C. outflow/inflow ratio
   D. none of the above

5. Assertion A : To estimate the rainfall over a catchment, the number of raingauges required per unit area is large for hilly areas. Reason R : Rainfall gradient is steep. Select your correct answer according to the coding system given below ?

   A. Both A and R are true and R is the correct explanation of A
   B. Both A and R are true but R is not the correct explanation of A
   C. A is true but R is false
   D. A is false but R is true

6. Unit of runoff in M.K.S. system is________________?

   A. cubic metre/sec
   B. metre/sec
   C. cubic metre
   D. square metre

7. 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

8. S-hydrograph is used to obtain unit hydrograph of________________?

   A. shorter duration from longer duration
   B. longer duration from shorter duration
   C. both (A) and (B)
   D. none of the above

9. The peak of a 4 hour flood hydrograph is 240 m3/sec . If the rainfall excess is 80 mm and base flow which is constant is 40 m3/sec, then the peak of 4-hours unit hydrograph will be__________________?

   A. 20 3/sec
   B. 25 m3/sec
   C. 30 m3/sec
   D. 35 m3/sec

10. Instantaneous unit hydrograph is a hydrograph of________________?

    1) unit duration
    2) unit rainfall excess
    3) infinitely small duration
    4) infinitely small rainfall excess
    The correct answer is?

    A. (1) and (2)
    B. (1)and(4)
    C. (2) and (3)
    D. (3) and (4)