| 1. | The highest efficiency is obtained with a channel of ............... section ? | |
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circular
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square
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rectangular
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trapezoidal
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Report Question| 2. | Coefficient of velocity is defined as the ratio of ? | |
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actual velocity of jet at vena contracta to the theoretical velocity
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area of jet at vena contracta to the area of orifice
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actual discharge through an orifice to the theoretical discharge
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none of the above
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| 3. | The pressure less than atmospheric pressure is known as ? | |
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suction pressure
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vacuum pressure
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negative gauge pressure
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all of these
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| 4. | The power transmitted through the pipe is maximum when the head lost due to friction is equal ? | |
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one-fourth of the total supply head
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one-third of the total supply head
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one-half of the total supply head
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two-third of the total supply head
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| 5. | In a broad-crested weir, the discharge is maximum if the head of water on the downstream side of weir is ............. the head of water on the upstream side of weir ? | |
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equal to
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one-third
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two-third
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three-fourth
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| 6. | A flow in which the quantity of liquid flowing per second is not constant, is called ? | |
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streamline flow
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turbulent flow
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steady flow
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unsteady flow
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| 7. | In open channels, the specific energy is the ? | |
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total energy per unit discharge
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total energy measured with respect to the datum passing through the bottom of the channel
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total energy measured above the horizontal datum
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kinetic energy plotted above the free surface of water
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| 8. | The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to ? | |
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half the depth
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half the breadth
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twice the depth
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twice the breadth
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| 9. | The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called ? | |
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surface tension
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compressibility
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capillarity
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viscosity
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| 10. | An air vessel is provided at the summit in a syphon to ? | |
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avoid interruption in the flow
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increase discharge
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increase velocity
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maintain pressure difference
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