Q. Which of the following equations as suggested by Colebrook and White gives the increase in roughness of a new surface (ε₀) with age/time (t) (where, ε = roughness of the surface after time't'. α = a co-efficient to be experimentally determined)?

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Q. Fluidised beds are formed, when the

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Q. A fluid is pumped at the rate of 10 lb/sec to a height of 55 ft. The horse power required is __________ hp.

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Q. With increase in pump speed, its NPSH requirement

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Q. In the Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass is __________ the fluid viscosity.

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Q. Gear pump

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Q. Most of the centrifugal pumps used in chemical plants are usually __________ driven.

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Q. Check valve provided in the discharge line of a centrifugal pump serves the purpose of controlling the

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Q. Which of the following two quantities when same, makes one pipe system equivalent to another pipe system ?

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Q. The kinetic energy correction factor for velocity distribution of laminar flow is

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Q. Priming of a centrifugal pump is done to

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Q. Bed pressure drop in an air fluidised bed of catalyst particles (ρₚ = 200 kg/m³, Dₚ = 0.05 cm) of 60 cm bed depth and bed porosity of 0.5 expressed in cm of water (manometer) is

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Q. For pipes that must be broken at intervals for maintenance, the connector used should be a/an

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Q. Absolute viscosity of a fluid is a function of the __________ of the fluid.

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Q. Select the wrong statement pertaining to flow of an incompressible fluid through a venturimeter.

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Q. Reynolds number for water flow through a tube of I.D. 5 cm is 1500. If a liquid of 5 centipoise viscosity and 0.8 specific gravity flows in the same pipe at the same velocity, then the pressure drop will

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Q. The bulk modulus of elasticity of a liquid

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Q. Potential flow is the flow of

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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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