Civil Engineering Hydrology MCQ Questions - Set 03 - ObjectiveBooks

# Practice Test: Question Set - 03

1. 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
(A) 0.2 × 106
(B) 0.6 × 106
(C) 2.4 × 106
(D) 7.2 × 106

2. The specifications of most commonly used standard gauges in India, are
(A) 200 sq. cm collector and 4 litres bottle
(B) 100 sq. cm collector and 2 litres bottle
(C) 200 sq. cm collector and 10 litres bottle
(D) 100 sq. cm collector and 4 litres bottle

3. For an annual flood series arranged in descending order of magnitude, the return for a magnitude listed at position period ‘m’ in a total is
(A) N/(m + l)
(B) m/(N + l)
(C) m/N
(D) (N + l)/m

4. A control meter is preferred to a weir because
(A) It measures the discharge even in silt Leiden streams
(B) The velocity of approach of the channel increases above the control, and thus removes the silt completely
(C) It is not damaged by floating debris
(D) All the above

5. The uplift pressure on the face of a drainage gallery in a dam is taken as
(A) Hydrostatic pressure at toe
(B) Average of hydrostatic pressure at toe and heel
(C) Two-third of hydrostatic pressure at toe plus one-third of hydrostatic pressure at heel
(D) None of the above

6. The elevation Z of the watershed is: (where letters carry their usual meanings)
(A) Reduced level of the top most point of the basin
(B) Reduced level of the lower most point of the basin
(C) Average elevation of the highest and lowest point of the drainage basin
(D) Obtained by the formula Z = (a1z1 + a2z2 + a3z3 + anzn)/A

7. As compared to gravity dams, earthen dams
(A) Are costlier
(B) Are less susceptible to failure
(C) Require sound rock foundations
(D) Require less skilled labour

8. The radius of influence is
(A) Radius of the main well
(B) Distance from the wall of main well to the point of zero draw down
(C) Distance from the centre of main well to the point of zero draw down
(D) None of these

9. In case of non-availability of space due to topography, the most suitable spillway is
(A) Straight drop spillway
(B) Shaft spillway
(C) Chute spillway
(D) Ogee spillway

10. Dickens’ formula for high flood estimate, is useful only for the catchments in
(A) Southern India
(B) Northern India
(C) Eastern India
(D) Western India

11. Silt excluders are constructed on the
(A) River bed upstream of head regulator
(B) River bed downstream of head regulator
(C) Canal bed upstream of head regulator
(D) Canal bed downstream of head regulator

12. Pick up the correct statement from the following:
(A) Rivers, lakes, oceans and springs get water from the rains
(B) Rain water is obtained by evaporation from rivers, lakes and oceans
(C) Water remains in atmosphere as vapours
(D) All the above

13. For a proportional outlet, the flexibility is
(A) Zero
(B) Between zero and 1
(C) 1
(D) Greater than 1

14. Pick up the correct statement from the following:
(A) The portion of pellicular water which remains unutilised, is called hygroscopic water
(B) The moisture content at which permanent wilting of plants takes place, is called the wilting point
(C) The moisture deficiency will be different at different points
(D) All the above

15. The aqueduct or super-passage type of works are generally used when
(A) High flood drainage discharge is small
(B) High flood drainage discharge is large and short lived
(C) High flood drainage discharge is large and continues for a long time
(D) None of the above

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