Hydrology and Ground Water

51. From the Survey of India map, the distance of the critical point is 20 km and difference in elevation is 193 m. The over land flow time, is

1. 2 hours
2. 3 hours
3. 2 hours and 30 minutes
4. 4 hours

View answer

52. Generally the weir is aligned at right angles to the direction of the main river current because

1. It ensures less length of the weir
2. It gives better discharging capacity
3. It is economical
4. All of the above

View answer

53. Horizontal acceleration due to earthquake results in

1. Hydrodynamic pressure
2. Inertia force into the body of the dam
3. Both (A) and (B)
4. None of the above

View answer

54. Humidity refers to

1. emperature of the air
2. ressure of the air
3. oisture content of the air
4. olume of the air

View answer

55. Hydrodynamic pressure due to earthquake acts at a height of

1. 3H/4π above the base
2. 3H/4π below the water surface
3. 4H/3π above the base
4. 4H/3π below the water surface, where H is the depth of water.

View answer

56. Hydrograph is a graphical representation of

1. Surface run off
2. Ground water flow
3. Rain fall
4. Discharge flowing in the river

View answer

57. Hydrology helps in

1. Predicting maximum flows
2. Deciding the minimum reservoir capacity
3. Forecasting the availability of quantity of water at reservoir site
4. All the above

View answer

58. Hydrology is the science which deals with

1. Rain water
2. River water
3. Sea water
4. Surface and underground water

View answer

59. If a gauge is installed perpendicular to the slope, its measurement is reduced by multiplying

1. Sine of the angle of inclination with vertical
2. Cosine of the angle of inclination with vertical
3. Tangent of the angle of inclination with vertical
4. Calibration coefficient of the gauge

View answer

60. If D is the depth of scour below original bed, then the width of launching apron is generally taken as

1. 1.2 D
2. 1.5 D
3. 2.0 D
4. 2.5 D

View answer