GATE 2020 PI – Question 21

General Engineering · Thermal and Fluids Engineering · 1 mark · Multiple choice

Oil flows with Reynolds number1500 in a5 cm pipe. Its kinematic viscosity is0.75 cm²/s. Find mean speed in m/s.

Show answer and explanation

Correct answer: (C) 2.25

Explanation

Re=VD/ν, so V=Reν/D. Convert ν=0.75×10⁻⁴ m²/s and D=0.05 m. Then V=1500(0.75×10⁻⁴)/0.05=2.25 m/s, C.

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