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.Management Sciences
Category: Hydraulics and Fluid Mechanics
In a free vortex motion, the radial component of velocity everywhere is ________________?
A. maximum
B. minimum
C. zero
D. non-zero and finite
E. unpredictable
Which of the following is dimensionless ________________?
A. specific weight
B. specific volume
C. specific speed
D. specific gravity
E. specific viscosity
A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury ?
A. the metal piece will simply float over the mercury
B. the metal piece will be immersed in mercury by half
C. whole of the metal piece will be immersed with its top surface just at mercury level
D. metal piece will sink to the bottom
E. none of the above
The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be____________________?
A. 500 kg
B. 1000 kg
C. 1500 kg
D. 2000 kg
E. 4000 kg.
Ratio of inertia force to surface Jension is known as ________________________?
A. Mach number
B. Froude number
C. Reynold’s number
D. Weber’s number
E. none of the above
If no resistance is encountered by displacement, such a substance is known as___________________?
A. fluid
B. water
C. gas
D. perfect solid
E. ideal fluid
The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as____________________?
A. meta center
B. center of pressure
C. center of buoyancy
D. center of gravity
E. none of the above
Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called________________?
A. adhesion
B. cohesion
C. viscosity
D. compressibility
E. surface tension
Differential monometer is used to measure _______________________?
A. pressure in pipes, channels etc.
B. atmospheric pressure
C. very low pressure
D. difference of pressure between two points
E. velocity in pipes
The units of dynamic or absolute viscosity are_______________?
A. metres2 per sec
B. kg sec/meter
C. newton-sec per meter
D. newton-sec2 per meter
E. none of the above
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