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.Management Sciences
Category: Fluid Mechanics for Chemical
In hindered settling, the particles are_________________________?
A. Placed farther from the wall
B. Not affected by other particles and the wall
C. Near each other
D. None of these
Which of the following is dimensionless ?
A. Angular velocity
B. Fanning friction factor
C. Specific volume
D. None of these
Froude number is the ratio of__________________?
A. Shear stress to gravitational stress
B. Drag stress to shear stress
C. Inertial stress to shear stress
D. Inertial stress to gravitational stress
Cd, Cc and Cv are related (for flow through an orifice) as (where, Cd = discharge co-efficient, Cc = co-efficient of contraction = (area of jet at vena-contracta/area of opening), Cv = co-efficient of velocity = (actual velocity at vena-contracta/theoretical velocity)?
A. Cd = Cc/Cv
B. Cd = Cc.Cv
C. Cd = Cv/ Cc
D. None of these
In a fluidised bed reactor___________________?
A. Temperature gradients are very high
B. Temperature is more or less uniform
C. Hot spots are formed
D. Segregation of the solids occurs
The head loss in turbulent flow in a pipe varies________________?
A. As velocity
B. As (velocity)2
C. Inversely as the square of diameter
D. Inversely as the velocity
The excess of the sum of pressure & velocity heads over the vapor pressure of the liquid at the suction is called the___________________?
A. Static submergence
B. Net positive suction head (NPSH)
C. Cavitation sensitivity
D. Priming
Baffles in mixing tanks are provided to__________________?
A. Reduce swirling and vortex formation
B. Increase the structural strength of the tank
C. Aid in rotational flow
D. None of these
Fanning friction factor equation applies to the _____________ fluid flow?
A. Non-isothermal condition of
B. Compressible
C. Both A. and B.
D. Neither A. nor B.
In which of the following body shapes, the pressure drag is large compared to the friction drag ?
A. Stream line body
B. Two dimensional body
C. Bluff body
D. None of these
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