Q. Umf is the minimum fluidisation velocity for a bed of particles. An increase in the superficial gas velocity from 2 Umf to 2.5 Umf results in (all velocities are smaller than the entrainment velocity of the particles) no change in the

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Q. Slugging occurs in a fluidised bed, if the bed is

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Q. The Mach number for hypersonic flow of compressible fluid is

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Q. Boundary layer thickness in turbulent flow over a flat plate increases as(where, d = distance from the leading edge.)

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Q. Mass velocity in case of steady flow and through a constant cross-section conduit is independent of the

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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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