Fluid Mechanics
Function of air vessel provided in a reciprocating pump is to

Avoid the necessity of priming
Reduce the danger of cavitation
Reduce discharge fluctuation
Increase the pump efficiency

ANSWER DOWNLOAD EXAMIANS APP

Fluid Mechanics
A stream line is

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

ANSWER DOWNLOAD EXAMIANS APP