Variability of rainfall is____________?

Related Mcqs:

1. 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

2. A 6 hours storm had 4 cm of rainfall and the resulting runoff was 2 cm. If <j) index remains at the same value, the runoff due to 10 cm of rainfall in 12 hours in the catchment is___________________?

   A. 4.5 cm
   B. 6.0 cm
   C. 7.5 cm
   D. 9.0 cm

3. The maximum rainfall depth of 300 mm in 24 hours has a return period of 100 years. The probability of 24 hours rainfall equal to or greater than 300 mm occurring at least once in 10 years is given by_____________?

   A. (0.99)10
   B. 1 – (0.99)10
   C. (0.9)’00
   D. l-(0.9)100

4. If the intensity of rainfall is more than the infiltration capacity of soil, then the infiltration rate will be______________?

   A. equal to rate of rainfall
   B. equal to infiltration capacity
   C. more than rate of rainfall
   D. more than infiltration capacity

5. 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

6. The rainfall on five successive days were measured as 100 mm, 80 mm, 60 mm, 40 mm and 20 mm respectively. If the infiltration index or the storm loss rate for the catchment area is earlier estimated as 50 mm/day, the total surface run off will be________________?

   A. 50 mm
   B. 60 mm
   C. 90 mm
   D. 140 mm

7. A runoff river plant is____________?

   A. a low head scheme
   B. a medium head scheme
   C. a high head scheme
   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. A repelling groyne is aligned________________?

   A. pointing upstream
   B. pointing downstream
   C. perpendicular to bank
   D. parallel to bank

10. The aqueduct or superpassage type of works are generally used when_______________?

    A. high flood drainage discharge is small
    B. high flood drainage discharge is large and short lived
    C. high flood drainage discharge is large and continues for a long time
    D. none of the above