Hydraulics & Fluid Mechanics
Choose the wrong statement

when in equilibrium, fluids can sustain shear forces
fluids are capable of flowing
when in equilibrium, fluids cannot sustain tangential forces
fluids conform to the shape of the con-taining vessels

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Hydraulics & Fluid Mechanics
For laminar flow in a pipe of circular cross-section, the Darcy’s friction factor f is

inversely proportional to Reynolds number and directly proportional to pipe wall roughness
directly proportional to pipe wall roughness and independent of Reynolds number
directly proportional to Reynolds number and independent of pipe wall roughness
inversely proportional to Reynolds number and indpendent of pipe wall roughness

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