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.Management Sciences
Category: Fluid Mechanics
When a liquid rotates at a constant angular velocity about a vertical axis as a rigid body, the pressure intensity varies________________?
A. linearly with radial distance
B. as the square of the radial distance
C. inversely as the square of the radial distance
D. inversely as the radial distance
Which of the following is used to measure the discharge ?
A. current meter
B. venturimeter
C. pitot tube
D. hotwire anemometer
The pressure at the summit of a syphon is_______________?
A. equal to atmospheric
B. less than atmospheric
C. more than atmospheric
D. none of the above
Metacentric height for small values of angle of heel is the distance between the________________?
A. centre of gravity and centre of buoy-ancy
B. centre of gravity and metacentre
C. centre of buoyancy and metacentre
D. free surface and centre of buoyancy
The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is_______________?
A. constant over the cross section
B. parabolic distribution across the section
C. zero at the mid plane and varies linearly with distance from mid plane
D. zero at plates and increases linearly to midpoint
An ideal fluid is_______________?
A. one which obeys Newton’s law of viscosity
B. frictionless and incompressible
C. very viscous
D. frictionless and compressible
Drag force is a function of________________?
1. projected area of the body
2. mass density of the fluid
3. velocity of the body
The correct answer is ?
A. (1) and (2)
B. (1) and (3)
C. (2) and (3)
D. (1), (2) and (3)
A floating body is said to be in a state of stable equilibrium_________________?
A. when its metacentric height is zero
B. when the metacentre is above the centre of gravity
C. when the metacentre is below the centre of gravity
D. only when its centre of gravity is below its centre of buoyancy
In which of the following the friction drag is generally larger than pressure drag?
A. a circular disc or plate held normal to flow
B. a sphere
C. a cylinder
D. an airfoil
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