Infiltration is the_______________?

A. Movement of water through the soil
B. Absorption of water by soil surface
C. Both (a) and (b)
D. None of the above

Cyclonic precipitation is caused by lifting of an air mass due to________________?

A. Pressure difference
B. Temperature difference
C. Natural topographical barriers
D. All of the above

A raingauge should preferably be fixed________________?

A. Near the building
B. Under the tree
C. In an open space
D. In a closed space

Under the same conditions, which of the following shapes of water surface will give the highest rate of evaporation ?

A. Flat water surface
B. Convex water surface
C. Concave water surface
D. Independent of shape of water surface

When surface of transpiration is submerged under water, then potential evapotranspiration is________________?

A. Much more than evapotranspiration
B. Much less than evapotranspiration
C. Equal to evapotranspiration
D. Equal to or less than evapotranspi-ration

The runoff increases with________________?

A. Increase in intensity of rain
B. Increase in infiltration capacity
C. Increase in permeability of soil
D. All of the above

A current meter is used to measure the__________________?

A. Velocity of flow of water
B. Depth of flow of water
C. Discharge
D. None of the above

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

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

The unit hydrograph of a specified duration can be used to evaluate the hydrograph of storms of_________________?

A. Same duration only
B. Same and shorter duration
C. Same and longer duration
D. Any duration