Chemical Engineering MCQs

Page No. 241

The head loss due to sudden contraction is proportional to___________________?


aVelocity

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bVelocity head

✓


cTurbulence

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dNone of these

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View Answer Velocity head

The continuity equation of fluid mechanics utilises the principle of conservation of _________________?


aMomentum

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bMass

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cEnergy

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dBoth B. & C.

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View Answer Mass

Existence of boundary layer in fluid flow is because of the_________________?


aSurface tension

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bFluid density

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cFluid viscosity

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dGravity forces

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View Answer Fluid viscosity

The energy loss over a length of pipeline according to Darcy-Weisbach equation for pipe flow is _______________ the mean velocity of flow?


aDirectly proportional to

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bDirectly proportional to square of

✓


cInversely proportional to

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dInversely proportional to square of

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In case of end to end connection of two or more pipes in series, the ______________ each pipe?


aSame rate of flow passes through

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bHead loss is same through

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cRate of flow in each pipe is proportional to the length of

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dTotal flow rate is the sum of flow rate in

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What is the ratio of displacement thickness to nominal thickness for a linear distribution of velocity in the boundary layer on a flat plate ?


a0.5

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b1

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c1.5

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d2

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View Answer 0.5

Foot valves are provided in the suction line of a centrifugal pump to ____________________?


aAvoid priming, every time we start the pump

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bRemove the contaminant present in the liquid

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cMinimise the fluctuation in discharge

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dControl the liquid discharge

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As per Newton’s law of viscosity, the shear stress for a given rate of angular deformation of fluid is proportional to (where, μ = fluid viscosity) ?


a1/μ

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bμ

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cμ2

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d1/μ2

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View Answer μ

Which of the following equations is valid for laminar flow of a fluid through packed bed ?


aFanning equation

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bKozeny – Karman equation

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cHagen-Poiseuille equation

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dBlake-Plummer equation

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A piezometer provided in the pipe measures__________________?


aFriction factor

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bStatic pressure

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cDynamic pressure

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dNone of these

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View Answer Static pressure

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