Hydraulics and fluid mechanics

3. 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

centre of gravity and centre of buoy-ancy
centre of gravity and metacentre
centre of buoyancy and metacentre
free surface and centre of buoyancy

Detailed SolutionMetacentric 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

4. 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

when its metacentric height is zero
when the metacentre is above the centre of gravity
when the metacentre is below the centre of gravity
only when its centre of gravity is below its centre of buoyancy

Detailed SolutionA 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

5. Surface tension A. acts in the plane of the interface normal to any line in the surface B. is also known as capillarity C. is a function of the curvature of the interface D. decreases with fall in temperature

acts in the plane of the interface normal to any line in the surface
is also known as capillarity
is a function of the curvature of the interface
decreases with fall in temperature

Detailed SolutionSurface tension A. acts in the plane of the interface normal to any line in the surface B. is also known as capillarity C. is a function of the curvature of the interface D. decreases with fall in temperature

6. 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 is frictionless D. it is at rest

it is incompressible
it has uniform viscosity
it is frictionless
it is at rest

Detailed SolutionThe 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 is frictionless D. it is at rest

7. A square surface 3 m x 3 m lies in a vertical line in water pipe its upper edge at vater surface. The hydrostatic force on square surface is A. 9,000 kg B. 13,500 kg C. 18,000 kg D. 27,000 kg

9,000 kg
13,500 kg
18,000 kg
27,000 kg

Detailed SolutionA square surface 3 m x 3 m lies in a vertical line in water pipe its upper edge at vater surface. The hydrostatic force on square surface is A. 9,000 kg B. 13,500 kg C. 18,000 kg D. 27,000 kg

8. The center of pressure of a surface subjected to fluid pressure is the point A. on the surface at which resultant pres-sure acts B. on the surface at which gravitational force acis C. at which all hydraulic forces meet D. similar to metacentre

on the surface at which resultant pres-sure acts
on the surface at which gravitational force acis
at which all hydraulic forces meet
similar to metacentre

Detailed SolutionThe center of pressure of a surface subjected to fluid pressure is the point A. on the surface at which resultant pres-sure acts B. on the surface at which gravitational force acis C. at which all hydraulic forces meet D. similar to metacentre

10. The rise or depression of liquid in a tube due to surface tension wim increase in size of tube will A. increase B. remain unaffected C. may increase or decrease depending on the characteristics of liquid D. decrease

increase
remain unaffected
may increase or decrease depending on the characteristics of liquid
decrease

Detailed SolutionThe rise or depression of liquid in a tube due to surface tension wim increase in size of tube will A. increase B. remain unaffected C. may increase or decrease depending on the characteristics of liquid D. decrease

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