Q. The D-Alembert's principle is used for changing the dynamic equilibrium of a fluid mass, into a static equilibrium.

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Q. Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, in the direction of flow of the liquid, is known as

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Q. The height of a water column equivalent to a pressure of 0.15 MPa is

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Q. The total energy of a liquid particle in motion is equal to

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Q. A notch is used to measure __________ of liquids.

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Q. A flow is called sonic, if the Mach number is unity.

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Q. An error of 1% in measuring head over the crest of the notch (H) will produce an error of __________ in discharge over a triangular notch,

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Q. A flow through a long pipe at decreasing rate is called __________ uniform flow.

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Q. The surface tension of mercury at normal temperature is __________ that of water.

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Q. The celerity (velocity) of a pressure wave in a fluid is given by (where K = Bulk modulus, and ρ = Density of the fluid)

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Q. The pressure intensity in kN/m² (or kPa) at any point in a liquid is (where w = Specific weight of liquid, and h = Depth of liquid from the surface)

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Q. The hydraulic gradient line is always parallel to the centre line of the pipe.

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Q. Barometer is used to measure

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Q. A closed tank is completely filled with an oil. If it is made to move with a horizontal acceleration, then the pressure at the back end will be more than that at the front end.

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Q. When a cylindrical vessel containing liquid is revolved about its vertical axis at a constant angular velocity, the pressure

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Q. The specific weight of compressible fluids does not remain constant.

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Q. 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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Q. In a convergent mouthpiece, the absolute pressure head at vena contracta is the same as that of the atmosphere.

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Q. Newton's law of viscosity is a relationship between

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Q. The loss of head due to viscosity for laminar flow in pipes is (where d = Diameter of pipe, l = Length of pipe, v = Velocity of the liquid in the pipe, μ = Viscosity of the liquid, and w = Specific weight of the flowing liquid)

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