Q. The value of critical Reynolds number for pipe flow is

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Q. Mach number is important in a fluid flow problem, when the inertia and __________ forces predominate.

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Q. Fanning friction factor is equal to (where, fʙ = Blassius friction factor).

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Q. In case of coutte flow, the fluid flow is between two large flat parallel plates with

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Q. In a stabilised soap bubble, pressure inside it compared to external pressure is

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Q. The component of acceleration resulting due to unsteady nature of flow is called __________ acceleration.

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Q. Power required for mixing Newtonion fluids is a function of the

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Q. Multistage compressors are used in industry, because they

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Q. The hydrodynamic and thermal boundary layers will merge, when

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Q. Differential manometer measures the

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Q. For a stable equilibrium of a submerged body (where, G and B are centres of gravity & buoyancy respectively).

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Q. With increase in the ratio of orifice diameter to pipe diameter in case of an orificemeter, the overall pressure loss

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Q. The vent valve provided in a liquid handling centrifugal pump is

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Q. The discharge through a semi-circular weir varies as (where, H = Head of liquid.)

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Q. In case of turbulent flow of a Newtonion fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity)

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Q. Centrifugal compressors compared to reciprocating compressors

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Q. For laminar flow of Newtonion fluids through a circular pipe, for a given pressure drop and length & diameter of pipe, the velocity of fluid is proportional to(where, μ = fluid viscosity )

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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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