Which of the following is an incorrect statement ?
(A) Coefficient of contraction of a venturimeter is unity
(B) Flow nozzle is cheaper than venturimeter but has higher energy loss
(C) Discharge is independent of orientation of venturimeter whether it is horizontal, vertical or inclined
(D) None of the above statement is correct.
If velocity is zero over l/3rd of a cross-section and is uniform over remaining 2/3rd of the cross-section, then the correction factor for kinetic energy is__________________?
(A) 4/3
(B) 3/2
(C) 9/4
(D) 27/8
Which of the following velocity potentials satisfies continuity equation ?
(A) x2y
(B) x2-y2
(C) cosx
(D) x2 + y2
In a forced vortex motion, the velocity of flow is________________?
(A) directly proportional to its radial distance from axis of rotation
(B) inversely proportional to its radial distance from the axis of rotation
(C) inversely proportional to the square of its radial distance from the axis of rotation
(D) directly proportional to the square of its radial distance from the axis of rotation
If the dynamic viscosity of a fluid is 0.5 poise and specific gravity is 0.5, then the kinematic viscosity of that fluid in stokes is__________________?
(A) 0.25
(B) 0.50
(C) 1.0
(D) none of the above
The viscosity of a gas_______________?
(A) decreases with increase in temperature
(B) increases with increase in temperature
(C) is independent of temperature
(D) is independent of pressure for very high pressure intensities
Newton’s law of viscosity relates________________?
(A) intensity of pressure and rate of angular deformation
(B) shear stress and rate of angular deformation
(C) shear stress, viscosity and temperature
(D) viscosity and rate of angular deformation
The position of center of pressure on a plane surface immersed vertically in a static mass of fluid is______________?
(A) at the centroid of the submerged area
(B) always above the centroid of the area
(C) always below the centroid of the area
(D) none of the above
A vertical rectangular plane surface is submerged in water such that its top and bottom surfaces are 1.5 m and 6.0 m res-pectively below the free surface. The position of center of pressure below the free surface will be at a distance of________________?
(A) 3.75 m
(B) 4.0 m
(C) 4.2m
(D) 4.5m
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