Knowledge of hydrology is necessary for civil engineers for designing and constr

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Question
Knowledge of hydrology is necessary for civil engineers for
Options
A. designing and construction of irrigation structures
B. designing and construction of bridges and culverts
C. flood control works
D. all the above.

Correct Answer

all the above.

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3. The centre of pressure of a liquid on a plane surface immersed vertically in a static body of liquid, always lies below the centroid of the surface area, because
Options
A. in liquids the pressure acting is same in-all directions
B. there is no shear stress in liquids at rest
C. the liquid pressure is constant over depth
D. the liquid pressure increases linearly with depth

4. If the straight sides of a triangular section of a lined canal with circular bottom of radius R, make an angle ? with horizontal, the perimeter of the canal is
Options
A. R(? + tan ?)
B. 2R(? + tan ?)
C. R(? + cos ?)
D. 2R(? + cos ?)
E. none of these.

6. For any star to be a circumpolar star, its
Options
A. declination must be 0�
B. declination must be 90�
C. distance from the pole must be less than the latitude of the observer
D. hour angle must be 180�.

7. Pick up the correct statement from the following :
Options
A. North end of the polar axis is known as north pole
B. South end of the polar axis is known as south pole
C. Point where polar axis when produced northward intersects the celestial sphere, is known as north celestial pole
D. Point where polar axis when produced southward intersects the celestial sphere, is known as south celestial pole
E. all the above.

8. For the most economical trapezoidal section of a channel with regards to discharge, the required condition, is
Options
A. half of top width = sloping side
B. hydraulic depth = half the depth
C.
D. perpendiculars drawn from the centre of the top width on to the bottom sloping side, are all equal
E. all the above.

9. To ensure constant moisture content in aggregates
Options
A. area of each aggregate pile should be large
B. height of each aggregate pile should not exceed 1.50 m
C. aggregate pile should be left for 24 hours before aggregates are used
D. conical heaps of aggregates should be avoided to prevent moisture variation
E. all the above.

10. The maximum amount of dust which may be permitted in aggregates is
Options
A. 5% of the total aggregates for low workability with a coarse grading
B. 10% of the total aggregates for low workability with a fine grading
C. 20% of the total aggregates for a mix having high workability with fine grading
D. all the above.

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