1
GATE ME 2006
+2
-0.6
The velocity profile in fully developed laminar flow in a pipe of diameter $$D$$ is given by $$u = {u_0}\left( {1 - 4{r^2}/{D^2}} \right),$$ where $$r$$ is the radial distance from the center. If the viscosity of the fluid is $$\mu ,$$ the pressure drop across a length $$L$$ of the pipe is
A
$${{\mu {u_0}L} \over {{D^2}}}$$
B
$${{4\mu {u_0}L} \over {{D^2}}}$$
C
$${{8\mu {u_0}L} \over {{D^2}}}$$
D
$${{16\mu {u_0}L} \over {{D^2}}}$$
2
GATE ME 1996
+2
-0.6
For laminar flow through a long pipe, the pressure drop per unit length increases.
A
in linear proportion to the cross-sectional area
B
in proportion to the diameter of the pipe
C
in inverse proportion to the cross-sectional area
D
in inverse proportion to the square of cross-sectional area
3
GATE ME 1988
+2
-0.6
The discharge in $${m^3}/s$$ for laminar flow through a pipe of diameter $$0.04$$ $$m$$ having a centre line velocity of $$1.5$$ $$m/s$$ is:
A
$$3\pi /50$$
B
$$3\pi /2500$$
C
$$3\pi /5000$$
D
$$3\pi /10000$$
GATE ME Subjects
Engineering Mechanics
Strength of Materials
Theory of Machines
Engineering Mathematics
Machine Design
Fluid Mechanics
Turbo Machinery
Heat Transfer
Thermodynamics
Production Engineering
Industrial Engineering
General Aptitude
EXAM MAP
Joint Entrance Examination