SSC JE Mechanical Engineering 2014 Set 2 Paper

Question : 139 of 200

Marks: +1, -0

An engine oil of viscosity 22.5 × 10

^{-2}

(Per.s) is flowing through a pipe of radius 1 m. Average velocity of oil through the pipe is 1.2 m/sec. If the velocity profile is parabolic profile then maximum velocity of oil is :

2.4 m/sec
1.8 m/sec
1.5 m/sec
3.6 m/sec

Validate

Solution:

µ

(viscosity)

= 22.5 × 10^{-2}

Pa. s.,
pipe radius = 1m

V_\avg= 1.2

m/s,

V_\max= ?

We know is case of pipe flow

V_\max/V_\avg=2

V_\max=1.2 × 2 = 2.4

m/s

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