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

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

The normal annual precipitation at stations X, A, B and C are 700 mm, 1000 mm, 900 mm and 800 mm respectively. If the storm precipitation at three station A, B and C were 100 mm, 90 mm and 80 mm respectively, then the storm precipitation for station X will be___________________?

A. 70mm
B. 80mm
C. 90 mm
D. 105 mm

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 area between the isohyets 45 cm and 55 cm is 100 square km and between 55 cm and 65 cm is 150 square km. The average depth of annua! precipitation over the above basin of 250 square km will be__________________?

A. 50 cm
B. 55 cm
C. 56 cm
D. 60 cm

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

A. Cubic metre/sec
B. Metre/sec
C. Cubic metre
D. Square metre

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

A 70% index of wetness means_______________?

A. Rain excess of 30%
B. Rain deficiency of 30%
C. Rain deficiency of 70%
D. None of the above

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

Which of the following is a non-recording raingauge ?

A. Tipping bucket type raingauge
B. Simon’s raingauge
C. Steven’s weighing type raingauge
D. Floating type raingauge