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
Related Mcqs:
- 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 - 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 - Which of the following types of rain gauges is used for measuring rain in remote hilly inaccessible areas ?
A. tipping bucket type
B. weighing type
C. floating type
D. Simon’s raingauge - 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 - 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 - 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 - According to Khosla’s theory, the exit gradient in the absence of a downstream cutoff is_____________?
A. 0
B. unity
C. infinity
D. very large - Select the correct statement?
A. A meander increases the river length but a cut off reduces the river length
B. A cutoff increases the river length but a meander reduces the river length
C. Both meander and cutoff increase the river length
D. Both meander and cutoff decrease the river length - Which of the following methods is used to estimate flood discharge based on high water marks left over in the past ?
A. slope-area method
B. area-velocity method
C. moving boat method
D. ultra-sonic method - 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
