A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is _________________?
(A) 0.83
(B) 0.6
(C) 0.4
(D) 0.3
(D) none of the above
In a free vortex motion, the radial component of velocity everywhere is________________?
(A) maximum
(B) minimum
(C) zero
(D) non-zero and finite
(D) unpredictable
The region between the separation streamline and the boundary surface of the solid body is known as__________________?
(A) wake
(B) drag
(C) lift
(D) boundary layer
(D) aerofoil section
The upper surface of a weir over which water flows is known is_____________________?
(A) crest
(B) nappe
(C) sill
(D) weir top
(D) contracta
Uniform flow occurs when_____________________?
(A) the direction and magnitude of the velocity at all points are identical
(B) the velocity of successive fluid paiticles, at any point, is the same at successive periods of time
(C) the magnitude and direction of the velocity do not change from point to point in the fluid
(D) the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each pleasure
(D) velocity, depth, pressure, etc. change from point to point in the fluid flow
Hydrometer is used to determine____________________?
(A) specific gravity of liquids
(B) specific gravity of solids
(C) specific gravity of gases
(D) relative humidity
(D) density
According to Bernoulli’s equation for steady ideal fluid flow____________________?
(A) principle of conservation of mass holds
(B) velocity and pressure are inversely proportional
(C) total energy is constant throughout
(D) the energy is constant along a stream-line but may vary across streamlines
(D) none of the above
At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be_________________?
(A) minimum
(B) maximum
(C) zero
(D) negative value
(D) could be any value
Two pipe systems can be said to be equivalent, when the following quantities are same__________________?
(A) friction loss and flow
(B) length and diameter
(C) flow and length
(D) friction factor and diameter
(D) velocity and diameter
True one-dimensional flow occurs when_________________?
(A) the direction and magnitude of the veiocity at all points are identical
(B) the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time
(C) the magnitude and direction of the velocity do not change from point to point in the fluid
(D) the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane
(D) velocity, depth, pressure etc. change from point to point in the fluid flow