Related Questions

The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe, where the wall heat flux is constant, is
A 2.36
B 4.36
C 120.36
D Dependent on NRe only
Nusselt number for full developed, laminar, constant property flow in a pipe at uniform heat flux is
A 0.72
B 4.364
C 18
D 83
A water tank with 64-gallon capacity is filled by pipe A and emptied by pipe B. If the rate of water flow through pipe A is 2 gallons per hour, how many gallons per hour should flow through pipe B so that when both pipes are open, the initially empty tank shold be full in exactly 96 hours?
A 3/8
B 4/3
C 2/3
D 8/3
Water flows into an empty 64-gallon drum through pipe A and flows out through pipe B. If the rate of flow through A is 2 gallons/hour, how many gallons per hour must flow out through pipe B so that the drum is full in exactly 96 hours?
A 3/8
B 1/2
C 2/3
D 4/3
A tank is filled by three pipes with uniform flow. The first two pipes operating simultaneously fill the tank in the same time during which the tank is filled by the third pipe alone. The second pipe fills the tank 5 hours faster than the first pipe and 4 hours slower than the third pipe. The time required by the first pipe is:
A 6 hours
B 10 hours
C 15 hours
D 30 hours
For laminar flow of Newtonion fluid in a circular pipe, the velocity distribution is a function of the distance 'd' measured from the centre line of the pipe, and it follows a __________ relationship.
A Logarithmic
B Parabolic
C Hyperbolic
D Linear
The velocity profile exhibited by laminar flow of Newtonion fluids is such that the velocity distribution w.r.t. radius of the circular pipe is a/an __________ with the apex at the centre line of the pipe.
A Hyperbola
B Parabola
C Semi-circle
D Semi-ellipse
Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the
A Length of the pipe
B Diameter of the pipe
C Density of the fluid
D Velocity of the fluid
For the laminar flow of a fluid in a circular pipe of radius R, the Hagen-Poisseule equation predicts the volumetric flow rate to be proportional to
A R
B R2
C R4
D R0.5
In case of laminar flow of fluid through a circular pipe, the
A Shear stress over the cross-section is proportional to the distance from the surface of the pipe
B Surface of velocity distribution is a paraboloid of revolution, whose volume equals half the volume of circumscribing cylinder
C Velocity profile varies hyperbolically and the shear stress remains constant over the cross-section
D Average flow occurs at a radial distance of 0.5 r from the centre of the pipe (r = pipe radius)

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