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.Management Sciences
Category: Hydraulics and Fluid Mechanics
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
The horizontal component of buoyant force is__________________?
A. negligible
B. same as buoyant force
C. zero
D. non of these
Free surface of a liquid tends to contract to the smallest possible area due to force of _________________?
A. surface tension
B. viscosity
C. friction
D. cohesion
E. adhesion
The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the sub-merged body is called___________________?
A. upthrust
B. reaction
C. buoyancy
D. metacentre
E. center of pressure
The flow in which conditions do not change with time at any point, is known as _____________________?
A. one dimensional flow
B. uniform flow
C. steady flow
D. turbulent flow
E. streamline flow
The bulk modulus of elasticity with increase in pressure___________________?
A. increases
B. decreases
C. remains constant
D. increases first upto certain limit and then decreases
E. unpredictable
Dynamic viscosity of most of the liquids with rise in temperature____________________?
A. increases
B. decreases
A. remains unaffected
D. unpredictable
E. none of the above
Two pipe systems can be said to be equivalent, when the following quantites are same______________?
A. friction loss and flow
B. length and diameter
C. flow and length
D. friction factor and diameter
E. velocity and diameter
The normal stress in a fluid will be constant in all directions at a point only if_________________?
A. it is incompressible
B. it has uniform viscosity
C. it has zero viscosity
D. it is frictionless
E. it is at rest.
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