5931. The boundary layer is that part of a moving fluid, in which the fluid velocity is
Affected by the fluid flow pressure
Constant
Affected by the presence of a solid boundary
All of the above
✅ The correct answer is option C.
Chemical Engineering
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5932. For liquid flow through a packed bed, the superficial velocity as compared to average velocity through the channel in the bed is
More
Less
Equal
Independent of porosity
✅ The correct answer is option B.
5933. Velocity distribution for flow between two fixed parallel plates
Varies parabolically across the section
Is constant over the entire cross-section
Is zero at the plates and increases linearly to the midplane
None of these
✅ The correct answer is option A.
5934. Fluidised beds are formed, when the
Fluid friction is zero
Gravity force is less than the fluid friction
Pressure forces equal gravity forces
Sum of the fluid friction and pressure forces is equal and opposite to gravity forces
✅ The correct answer is option B.
5935. The maximum depth from which a centrifugal pump can draw water is
Dependent on the speed of the pump
Dependent on the power of the pump
34 feet
150 feet
✅ The correct answer is option C.
5936. Drag co-efficient for flow past immersed body is the ratio of __________ to the product of velocity head and density.
Shear stress
Shear force
Average drag per unit projected area
None of these
✅ The correct answer is option C.
5937. Turbulent flow generally occurs for cases involving
Highly viscous fluid
Very narrow passages
Very slow motion
None of these
✅ The correct answer is option D.
5938. In a fully turbulent flow (Re > 105) in a pipe of diameter ‘d’, for a constant pressure gradient, the dependence of volumetric flow rate of an incompressible fluid is
d
d2
d2.5
d4
✅ The correct answer is option C.
5939. The line of action of the buoyant force passes through the centre of gravity of the
Submerged body
Displaced volume of the fluid
Volume of fluid vertically above the body
Horizontal projection of the body
✅ The correct answer is option B.
5940. The fluid in which the shearing stress within it is proportional to the velocity gradient across the sheared section, is called a __________ fluid.
Bingham
Newtonion
Perfect
None of these
✅ The correct answer is option B.