141. The earthen embankments constructed parallel to the river banks at some suitable distance for flood control, are known as
A. floods walls
B.dikes
C. levees
D. both B and C.

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142.  Levees and flood walls,
A. are designed to carry unbalanced water load
B. are designed with adequate dimensions
C. are means of controlling floods
D. are never provided free-boards.

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