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
Related Mcqs:
- If the weight of a body immersed in a fluid exceeds the buoyant force, then the 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 - 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 - The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as__________________?
A. center of gravity
B. center of buoyancy
C. center of pressure
D. metacentre - Two pipe systems are said to be equivalent when_________________?
A. head loss and discharge are same in two systems
B. length of pipe and discharge are same in two systems
C. friction factor and length are same in two systems
D. length and diameter are same in two systems - In steady flow of a fluid, the total accele ration of any fluid particle______________?
A. can be zero
B. is never zero
C. is always zero
D. is independent of coordinates - The distance from pipe boundary, at which the turbulent shear stress is one-third die wall shear stress, is_______________?
A. 1/3 R
B. 1/2 R
C. 2/3 R
D. 3/4Rwhere R is the radius of pipe
- If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be___________________?
A. from reservoir A to reservoirs B and C
B. from reservoir B to reservoirs C and A
C. from reservoir C to reservoirs A and B
D. unpredictable - The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is________________?
A. 0.223 R
B. 0.423 R
C. 0.577 R
D. 0.707 Rwhere R is radius of pipe
- When the velocity distribution is uniform over the cross-section, the correction factor for momentum is__________________?
A. 0
B. 1
C. 4/3
D. 2 - Pascal-second is the unit of______________?
A. pressure
B. kinematic viscosity
C. dynamic viscosity
D. surface tension
