Chemical Engineering MCQs

6108 MCQs (Page 381 of 611)

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An ideal fluid is___________________?

A. Frictionless & incompressible
B. One, which obeys newton’s law of viscosity
C. Highly viscous
D. None of these

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A weir is used to measure the large water discharge rate from a river or from an open channel. A weir is not of _______________ shape?

A. Circular
B. Rectangular
C. Triangular
D. Trapezoidal

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Centrifugal pump can’t be used to pump _____________________?

A. Molten sodium (used as a coolant in fast breeder reactor)
B. Moderately viscous vegetable oil used in soap industry
C. Thick molten soap at 80°c
D. None of the above

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____________ flow means the flow of incompressible fluid with no shear ?

A. Potential
B. Streamline
C. Creep
D. Boundary layer

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

A. √d
B. D1/3
C. D2
D. D2/3

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Normal depth in open channel flow is the depth of flow in the channel ____________________?

A. Corresponding to uniform flow
B. Measured normal to the channel bed
C. Corresponding to steady flow
D. None of these

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Ratio of inertial forces to surface tension forces is called the _____________ number?

A. Euler
B. Froude
C. Mach
D. Weber

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Two piping system are said to be equivalent, when the ______________ are same?

A. Fluid flow rate & friction loss
B. Length & friction factor
C. Diameter & friction factor
D. Length & diameter

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In which of the following cases, it is possible for flow to occur from low pressure to high pressure ?

A. Flow of liquid upward in a vertical pipe
B. Flow through a converging section
C. Flow of air downward in a pipe
D. Impossible in a constant cross-section conduit

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An ideal plastic substance indicates no deformation, when stressed upto yield stress, but behaves like a Newtonian fluid beyond yield stress. Which of the following is an ideal plastic ?

A. Sewage sludge
B. Rubber latex
C. Blood
D. Sugar solution

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