Fluid Mechanics for Chemical MCQs

724 MCQs — Chemical Engineering MCQs (Page 19 of 73)

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A Venturimeter measures the___________________?

A. Velocity head
B. Pressure
C. Point velocity
D. None of these

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The discharge through a rectangular weir varies as ___________________?

A. H1/2
B. H5/2
C. H2/5
D. H3/2

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To handle smaller quantity of fluid at higher discharge pressure, use a ______________ pump?

A. Reciprocating
B. Centrifugal
C. Volute
D. Rotary vacuum

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Froude number is not a factor__________________?

A. For reynolds number greater than 300
B. When there is no vortex formation
C. For unbaffled tank
D. None of these

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Check valve is used for ________________ flow?

A. Very precise control of
B. Unidirectional
C. Multidirectional
D. None of these

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In turbulent flow, the__________________?

A. Fluid particles move in an orderly manner
B. Momentum transfer is on molecular scale only
C. Shear stress is caused more effectively by cohesion than momentum transfer
D. Shear stresses are generally larger than in a similar laminar flow

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Bernoulli’s equation for steady, frictionless, continuous flow states that the ______________ at all sections is same?

A. Total pressure
B. Total energy
C. Velocity head
D. None of these

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A streamline is a line in flow field _________________?

A. That is traced by all the fluid particles passing through a given point
B. Along which a fluid particle travels
C. Such that at every point on it, the velocity is tangential to it
D. None of these

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The co-efficient of discharge of an orificemeter is a function of ________________?

A. Reynolds number at the orifice
B. Ratio of orifice dia to pipe dia
C. Both a. and b.
D. None of the above parameters, and has a constant value of 0.61

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A 2″ gate valve fitted in a pipe is replaced by a similar globe valve. Pressure drop in gate valve was Δp. For the same discharge, the pressure drop across globe valve is__________________?

A. Δp
B. < δp
C. > δp
D. Δp2

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