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Q: An economical cross-section of an irrigation canal is formed partly in cutting and partly in filling, with the depth of cutting in canal cross-section equal to balancing depth. What does this indicate ?
  • A. Quantity of earthwork in filling = Two times the quantity of earthwork in cutting
  • B. Quantity of earthwork in cutting = Quantity of earthwork in filling
  • C. Wettede perimter of cutting portion of canal = Wetter perimeter of the filling portion of canal
  • D. Depth of earthwork cutting = Depth of earthwork in filling
Correct Answer: Option B - A canal section will be economical when the earth work involved at a particular section has an equal amount of cut and fill. • Usually a canal section has a part in cutting and part in filling.
B. A canal section will be economical when the earth work involved at a particular section has an equal amount of cut and fill. • Usually a canal section has a part in cutting and part in filling.

Explanations:

A canal section will be economical when the earth work involved at a particular section has an equal amount of cut and fill. • Usually a canal section has a part in cutting and part in filling.