Hydrology and Ground Water

31. Bernard's distribution graph is a plot of time on X-axis and

1. Run off on the y-axis
2. Total run off on the y-axis
3. Percentage of total surface run off on y-axis
4. Percentage of total surface run off during uniform time intervals on y-axis

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32. Boston society of Civil Engineer's formula Q = 0.0056 × (D/t) in cumecs/square km is based upon

1. Rainfall and drainage area
2. Total run off and drainage area
3. Drainage area and its shape
4. Drainage area

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33. Burge formula Q = 19.6 (A/L_2/3) cumecs is based upon

1. Rainfall and drainage area
2. Run off and drainage area
3. Drainage area and its shape
4. Drainage area

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34. Coefficient of discharge of an ogee spillway

1. Depends on depth of approach and upstream slope
2. Depends on downstream apron interference and downstream submergence
3. Remains constant
4. Both (A) and (B)

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35. Consumptive use of a crop during growth, is the amount of

1. Interception
2. Transpiration
3. Evaporation
4. All the above

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36. Dickens'formula for high flood estimate, is useful only for the catchments in

1. outhern India
2. orthern India
3. astern India
4. estern India

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37. Discharge curve may be extended by logarithmic method if

1. Cross section of river is uniform
2. River is broader and shallower
3. River is of any type
4. None of these

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38. Evaporation losses depend upon

1. Area of the water surface and depth of the water
2. Nature of precipitation and type of vegetation
3. Humidity and wind velocity
4. All the above

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39. For a catchment area of 120 km², the equilibrium discharge in m3/hour of a Scurve obtained by the summation of 6 hour unit hydro graph is

1. 0.2 × 10⁶
2. 0.6 × 10⁶
3. 2.4 × 10⁶
4. 7.2 × 10⁶

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40. For a proportional outlet, the flexibility is

1. Zero
2. Between zero and 1
3. 1
4. Greater than 1

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