Q. The valve used for very remote and accurate control of fluid is a __________ valve.

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Q. f = 16/Nʀₑ, is valid for

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Q. A rotameter works on the principle of __________ pressure drop.

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Q. The effect of solid boundary on the fluid flow is confined to the boundary layer, except for fluids

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Q. The excess of the sum of pressure & velocity heads over the vapor pressure of the liquid at the suction is called the

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Q. Piezometric head is the sum of the __________ heads.

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Q. Propellers are

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Q. Which of the following is not an advantage of fluidisation from transfer operation point of view?

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Q. Upto what value of 'Mach number', a fluid may be considered as incompressible ?

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Q. The head developed by a centrifugal pump is largely determined by the

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Q. Pick out the wrong statement:

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Q. Flow rate of high velocity flue gas discharged through a stack to the atmosphere can be most conveniently measured by a

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Q. What is the ratio of total kinetic energy of fluid passing per second to the value obtained on the basis of average velocity (for laminar flow through a circular pipe)?

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Q. The line traced by a single fluid particle as it moves over a period of time is called __________ line.

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Q. The pressure head on sudden contraction in a horizontal pipe is converted into the __________ head.

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Q. A stream tube is that, which has __________ cross-section entirely bounded by stream lines.

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Q. A mixed flow centrifugal pump

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Q. In centrifugal pump operation, the cavitation can be eliminated by maintaining suction pressure __________ the vapor pressure of the liquid at the suction temperature.

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Q. A rectangular surface 3' x 4', has the lower 3 edge horizontal and 6' below a free oil surface (sp. gr. 0.8). The surface inclination is 300 with the horizontal. The force on one side of the surface is (where, y = specific weight of water)

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Q. A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle system (in SI units) is given below :

Δ P/L = 375 x 10³ Vₒₘ + 10.94 x 10⁶ V² ₒₘ (SI units)

If water is to be used as the fluidising medium, the minimum fluidisation velocity, Vₒₘ is

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