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.Management Sciences
Category: Fluid Mechanics
A square surface 3 m x 3 m lies in a vertical line in water pipe its upper edge at water surface. The hydrostatic force on square surface is____________________?
A. 9,000 kg
B. 13,500 kg
C. 18,000 kg
D. 27,000 kg
E. 30,000 kg
Surface energy per unit area of a surface is numerically equal to _____________________?
A. atmospheric pressure
B. surface tension
C. force of adhesion
D. force of cohesion
E. viscosity
The value of mass density in kgsecVm4 for water at 0°C is_________________?
A. 1
B. 1000
C. 100
D. 101.9
E. 91
Euler’s dimensionless number relates the following__________________?
A. inertial force and gravity
B. viscous force and inertial force
C. viscous force and buoyancy force
D. pressure force and inertial force
E. pressure force and viscous force
If the surface of liquid is convex, men ___________________?
A. cohesion pressure is negligible
B. cohesion pressure is decreased
C. cohesion pressure is increased
D. there is no cohesion pressure
E. none of the above
Falling drops of water become spheres due to the property of ____________________?
A. adhesion
B. cohesion
C. surface tension
D. viscosity
E. compressibility
Specific weight of water in S.I. units is equal to ________________?
A. 1000 N/m3
B. 10000 N/m3
C. 9.81 xlO3 N/m3
D. 9.81 xlO6N/m3
E. 9.81 N/m3
The tendency of a liquid surface to contract is due to the following property_____________?
A. cohesion
B. adhesion
C. viscosity
D. surface tension
E. elasticity
For manometer, a better liquid combination is one having ___________________?
A. higher surface tension
B. lower surface tension
C. surface tension is no criterion
D. high density and viscosity
E. low density and viscosity
The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to_________________?
A. 1000
B. 2100
C. 2700
D. 10,000
E. 21,000
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