Multiple Choice Questions Hydrology and Water Resources Engineering - Set 02 - ObjectiveBooks

# Practice Test: Question Set - 02

1. Isohyets are the imaginary lines joining the points of equal
(A) Pressure
(B) Height
(C) Humidity
(D) Rainfall

2. As per Lacey’s theory, the silt factor is
(A) Directly proportional to average particle size
(B) Inversely proportional to average particle size
(C) Directly proportional to square root of average particle size
(D) Not related to average particle size

3. The time required by rain water to reach the outlet of drainage basin, is generally called
(A) Time of concentration
(B) Time of overland flow
(C) Concentration time of overland flow
(D) Duration of the rainfall

4. Which of the following is a flexible outlet?
(A) Submerged pipe outlet
(B) Kennedy’s gauge outlet
(C) Gibb’s outlet
(D) None of the above

5. Pick up the correct statement from the following:
(A) The specified duration of unit hydro-graph, is called unit duration
(B) The rain during specified duration, is called unit storm
(C) The number of unit hydrographs for a given basin, is theoretically infinite
(D) All the above

6. The drainage water intercepting the canal can be disposed of by passing the canal below the drainage in
(A) Aqueduct and syphon aqueduct
(B) Aqueduct and super passage
(C) Super passage and canal syphon
(D) Level crossing

7. The rate of rainfall for successive 10 minute periods of a 60 minute duration storm, are shown in the below figure. If the value of φindex is 3 cm/hour, the runoff will be
(A) 2 cm
(B) 3 cm
(C) 4 cm
(D) 5 cm

8. River training for depth is achieved by
(A) Groynes
(B) Construction of dykes or leaves
(C) Both (A) and (B)
(D) Groynes and bandalling

9. Pick up the correct statement from the following:
(A) A confined bed of impervious material laid over an aquifer, is known as an aquiclude
(B) The top most water bearing strata having no aquifer, is known as non-artesian aquifer
(C) The ordinary gravity wells which supply water from the top most water bearing strata, are called water table wells
(D) All the above

10. A land is known as waterlogged
(A) When the permanent wilting point is reached
(B) When gravity drainage has ceased
(C) Capillary fringe reaches the root zone of plants
(D) None of the above

11. Boston society of Civil Engineer's formula Q = 0.0056 × (D/t) in cumecs/square km is based upon
(A) Rainfall and drainage area
(B) Total run off and drainage area
(C) Drainage area and its shape
(D) Drainage area

12. A hyetograph is a graphical representation of
(A) Rainfall intensity and time
(B) Rainfall depth and time
(C) Discharge and time
(D) Cumulative rainfall and time

13. Pick up the correct statement from the following:
(A) Hydrograph is a plot of discharge and time
(B) In hydrographs, time is plotted on X-axis
(C) The maximum flow in the river due to rainfall, is called peak flow
(D) All the above

14. 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) Ultrasonic method

15. If the dew point is greater than 0°C
(A) Dew will be formed
(B) Frost will be formed
(C) Vapours will be formed
(D) None of these

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