Q. The pressure less than atmospheric , pressure, is known

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Q. A rise or fall of liquid in a glass tube of a very small diameter when dipped is

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Q. To measure very low pressure, we use

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Q. If v1 and v2 are the velocities of flow before and after sudden enlargement in a pipe, the head loss given by Carnot and Borda equation, is

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Q. Equation of continuity of fluids is applicable only if

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Q. The flow in open channel is said to be critical if the Froude number is :

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Q. An orifice is an opening in a vessel with

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Q. The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particles at each point, is called

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Q. To avoid the tendency of separation of liquid flow, the most suitable ratio of the diameters of the throat and the pipe, is

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Q. The instrument used for measuring the velocity of flow, is known as

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Q. For a long pipe, the head loss

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Q. On a flow net diagram, the distance between two consecutive steam lines at two successive sections are 1 cm and 0.5 cm respectively. If the velocity at the first section is 1 m/sec, the velocity at the second is

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Q. The flow is called rotational if its velocity normal to the plane of area is equal to

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Q. In flowing liquids pitot tubes are used measure

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Q. Capillary rise of water is

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Q. A water tank partially filled with water is being carried on a truck moving with a constant horizontal acceleration. The level of the water

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Q. An error of 1% in measuring the head of water over the crest of a rectangular weir, produces an error in the discharge which is equal to

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Q. Flow of water in pipes of diameter more than 3 metres, can be measured by

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Q. Hydraulic grade line

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Q. If the Mach number for a fluid flow is less than 1, the flow is

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