Fluid Mechanics
Transition from laminar flow to turbulent flow is aided by the

Vibration
All of these
Surface roughness and curvature (i.e.sharp corners)
Pressure gradient and the compressibility of the flowing medium

ANSWER DOWNLOAD EXAMIANS APP

Fluid Mechanics
In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of

All of these
Friction co-efficient for flows at equal Reynold number
Relative roughness
Absolute roughness

ANSWER DOWNLOAD EXAMIANS APP