MCQ
41. Instantaneous unit hydrograph is a hydrograph of (i) Unit duration (ii) Unit rainfall excess (iii) Infinitely small duration (iv) Infinitely small rainfall excess The correct answer is
(i) and (ii)
(i) and (iv)
(ii) and (iii)
(iii) and (iv)
42. Pick up the correct statement from the following:
The ratio of total volume of voids in soil aggregates to the total volume of aggregate, is called Porosity
Water retained by the interstices due to molecular attraction, is called pellicular water
Sum of the percentage of specific yield and specific retention is 100
All the above
43. Phytometer method is generally used for the measurement of
Interception
Evaporation
Transpiration
None of these
44. Which of the following canal outlets maintains a constant discharge?
Non-modular outlet
Flexible outlet
Rigid module
None of the above
45. Knowledge of hydrology is necessary for civil engineers for
Designing and construction of irrigation structures
Designing and construction of bridges and culverts
Flood control works.
All the above
46. If there are two canals taking off from each flank of a river, then there will be
One divides wall and one under-sluice
One divides wall and two under-sluices
Two divide walls and one under-sluice
Two divide walls and two under-sluices
47. Interception losses are due to (i) Evaporation (ii) Transpiration (iii) Stream flow The correct answer is
Only (i)
(i) and (ii)
(ii) and (iii)
(i), (ii) and (iii)
48. Infiltration capacity of soil depends upon
Number of voids present in the soil
Shape and size of soil particles
Arrangement of soil particles
All the above
49. For wave action in dams, the maximum height of freeboard is generally taken to be equal to
0.5 hw
0.75 hw
1.25 hw
1.50 hw
50. The most suitable material for the central impervious core of a zoned embankment type dam is
Clay
Coarse sand
Silty clay
Clay mixed with fine sand
51. Pick up correct statement from the following:
The air from outer portion of cyclones gets lifted for causing precipitation
The air from central portion of cyclone's gets lifted for causing precipitation
The air from entire surface of the cyclones gets lifted for causing precipitation
None of those
52. Tortuosity of a meandering river is always
Equal to 1
Less than 1
Greater than 1
Less than or equal to 1
53. From the data of the rain storm shown in the below figure, the value of Windex is
1.5 cm/hour
2 cm/hour
2.5 cm/hour
3 cm/hour
54. Horizontal acceleration due to earthquake results in
Hydrodynamic pressure
Inertia force into the body of the dan
Both (A) and (B)
None of the above
55. The equation P-Q-Te index for determining the infiltration capacity, was suggested by
Horton
Horner
Lloyd
Bernard
56. Water contains
One hydrogen atom and one oxygen atom
Two hydrogen atoms and one oxygen atom
One hydrogen atom and two oxygen atoms
Three hydrogen atoms
57. If the loss due to friction in pipes is 4 m, the total losses in strainer and bends may be taken as
0.10 m
0.20 m
0.5 m
1.0 m
58. Sharp crested weirs are generally used
For large flows
For small flows
For streams carrying high sediment loads
For rivers carrying floating debris
59. A runoff river plant is
A low head scheme
A medium head scheme
A high head scheme
None of the above
60. If the axial length of a drainage basin is 35 km and its form factor is 0.2, the total area of the basin is
205 sq. km.
215 sq. km.
225 sq. km.
245 sq. km.