Extracted text: 8. Free board is provided in channel design only for: a) Loose boundary channel b) Rigid boundary channel c) All type of channel 9. Rigid boundary channels carrying sediment-laden water should meet which criteria: a) Should balance out shear stress with critical stress of the bed material b) Should satisfy minimum and maximum velocity of flow criteria c) Should only satisfy minimum velocity of flow criteria 10. For a Loose Boundary channels carrying sediment free water: a) The bed stress is less than side stress of the channel b) The side stress is neglected for the channel design c) The bed stress is more than side stress of the channel 11. Given, coefficient of velocity is 0.9 and coefficient of contraction is 0.8, then coefficient of discharge will be equal to: a) 0.63 b) 0.72 c) 0.75