Top 1000+ Solved Fluid Mechanics (FM) MCQ Questions Answer
Q. Centre of buoyancy always
a. coincides with the centre of gravity
b. coincides with the centroid of the volume of fluid displaced
c. remains above the centre of gravity
d. remains below the centre of gravity
Q. If the weight of a body immersed in a fluid exceeds the buoyant force, thenthe body will
a. rise until its weight equals the buoyant force
b. tend to move downward and it may finally sink
c. float
d. none of the above
Q. Metacentric height for small values of angle of heel is the distance betweenthe
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
Q. 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
Q. The increase in meta centric heighti) increases stability ii) decreases stability iii) increases comfort for passengers iv) decreases comfort for passengers The correct answer is
a. (i) and (iii)
b. (i)and(iv)
c. (ii) and (iii)
d. (ii) and (iv)
Q. The point in the immersed body through which the resultant pressure ofthe liquid may be taken to act is known as
a. center of gravity
b. center of buoyancy
c. center of pressure
d. metacentre
Q. If a vessel containing liquid moves downward with a constant accelerationequal to ‘g’ then
a. the pressure throughout the liquid mass is atmospheric
b. there will be vacuum in the liquid
c. the pressure in the liquid mass is greater than hydrostatic pressure
d. none of the above
Q. When a liquid rotates at a constant angular velocity about a vertical axisas 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
Q. A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the center of bottom is
a. zero
b. one-fourth its value when cylinder was full
c. one-half its value when cylinder was full
d. cannot be predicted from the given data
Q. The horizontal component of force on a curved surface is equal to the
a. product of pressure intensity at its centroid and area
b. force on a vertical projection of the curved surface
c. weight of liquid vertically above the curved surface
d. force on the horizontal projection of the curved surface
Q. A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, theni) the ball will move to the front ii) the bubble will move to the front iii) the ball will move to the rear iv) the bubble will move to the rear Find out which of the above statements are correct ?
a. (i) and (ii)
b. (i)and(iv)
c. (ii) and (iii)
d. (iii) and (iv)