A floating/submerged body is always stable, if its centre of gravity___________________?

Related Mcqs:

1. For a stable equilibrium of a submerged body (where, G and B are centres of gravity & buoyancy respectively) ?

   A. G is above B
   B. B is above G
   C. B & G coincide
   D. None of these

2. Centre of pressure in an immersed body is ______________ the centre of gravity?

   A. Above
   B. Below
   C. At
   D. Either above or below; depends on the liquid density

3. The location of centre of pressure, which defines the point of application of the total pressure force on the surface, can be calculated by applying the principle of moments according to which “sum of the moment of the resultant force about an axis is equal to the sum of the components about the same axis”. The centre of pressure of a rectangular surface (of width ‘w’) immersed vertically in a static mass of fluid is at a depth of (where, y = depth of the liquid) ?

   A. 1/(y/3)
   B. 2y/3
   C. 1/(y/4)
   D. 3y/4

4. The time of oscillation of a floating body is _________________?

   A. Longer, if Metacentric height is increased
   B. Independent of the Metacentric height
   C. Dependent on the buoyant forces only
   D. None of these

5. The curve of metacentre for a floating body ____________ the curve of buoyancy?

   A. Is always below
   B. Is the evolute of
   C. Intersects at right angle
   D. Is tangential to

6. The buoyant force acting on a floating body is dependent on the _______________?

   A. Viscosity of the liquid
   B. Weight of the liquid displaced
   C. Depth of immersion of the body
   D. Surface tension of the liquid

7. For an unstable equilibrium of a floating body (where, M = metacentre.) ?

   A. M is above G
   B. M is below G
   C. M & G coincide
   D. None of these

8. Volume of liquid displaced by a floating body is equivalent to its_________________?

   A. Own weight
   B. Submerged weight
   C. Own volume
   D. Submerged volume

9. The length of the tube necessary for the boundary layer to reach the centre of the tube and for fully developed flow to be established is called the _____________ length?

   A. Equivalent
   B. Transition
   C. Prandtl mixing
   D. None of these

10. The velocity profile exhibited by laminar flow of Newtonian fluids is such that the velocity distribution w.r.t. radius of the circular pipe is a/an ______________ with the apex at the centre line of the pipe?

    A. Hyperbola
    B. Parabola
    C. Semi-circle
    D. Semi-ellipse