Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ — decoded step-by-step.
Solve it the standard way once — then learn the shortcut.
Q · Fluid MechanicsMedium · 45s
Which dimensionless number signifies the ratio of inertial forces to viscous forces? Option: 21
TopicFluid Mechanics
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained — no skipped algebra.
Reynolds number = (Inertial forces) / (Viscous forces).
21
Final Answer: Option (b