Fluid Mechanics
For Laminar flow through a packed bed, the pressure drop is proportional to (Vs is the superficial liquid velocity and Dp is the particle diameter)

Vs/Dp³
Vs/Dp²
Vs²/Dp²
Vs²/Dp³

ANSWER DOWNLOAD EXAMIANS APP

Fluid Mechanics
A stream line is

Fixed in space in steady flow
Drawn normal to the velocity vector at every point
A line connecting the mid points of flow cross-section
Always the path of particle

ANSWER DOWNLOAD EXAMIANS APP