F.S.L. of a canal at its head with respect to parent channel is kept A. At the same level B. 15 cm lower C. 15 cm higher D. None of these

[amp_mcq option1=”At the same level” option2=”15 cm lower” option3=”15 cm higher” option4=”None of these” correct=”option1″]

The correct answer is: A. At the same level.

The F.S.L. of a canal at its head with respect to parent channel is kept at the same level. This is done to ensure that the water flows smoothly from the parent channel into the canal. If the F.S.L. of the canal was higher than the parent channel, the water would flow out of the canal and into the parent channel. If the F.S.L. of the canal was lower than the parent channel, the water would not flow into the canal and the canal would dry up.

Option B is incorrect because the F.S.L. of the canal is not kept 15 cm lower than the parent channel. This would cause the water to flow out of the canal and into the parent channel.

Option C is incorrect because the F.S.L. of the canal is not kept 15 cm higher than the parent channel. This would cause the water not to flow into the canal and the canal would dry up.

Option D is incorrect because the F.S.L. of the canal is kept at the same level as the parent channel.