An ideal flow of any fluid must satisfy ___________________?
(A) Pascal law
(B) Newton’s law of viscosity
(C) boundary layer theory
(D) continuity equation
(D) Bernoulli’s theorem
Non uniform flow occurs when ____________________?
(A) the direction and magnitude of the velocity 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 aricf 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
Gradually varied flow is____________________?
(A) steady uniform
(B) non-steady non-uniform
(C) non-steady uniform
(D) steady non-uniform
(D) true one-dimensional
During the opening of a valve in a pipe line, the flow is___________________?
(A) steady
(B) unsteady
(C) uniform
(D) laminar
(D) free vortex type
In the case of steady flow of a fluid, the acceleration of any fluid particle is__________________?
(A) constant
(B) variable
(C) zero
(D) zero under limiting conditions
(D) never zero
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
Flow of water in a pipe about 3 meters in diameter can be measured by_________________?
(A) orifice plate
(B) venturi
(C) rotameter
(D) pitot tube
(D) nozzle
Rotameter is a device used to measure____________________?
(A) absolute pressure
(B) velocity of fluid
(C) flow
(D) rotation
(D) velocity of air
A piece of metal of specific gravity 7 floats in mercury of specific gravity 13.6. What fraction of its volume is under mercury ?
(A) 0.5
(B) 0.4
(C) 0.515
(D) 0.5
(D) none of the above
A streamline is defined as the line ________________?
(A) parallel to central axis flow
(B) parallel to outer surface of pipe
(C) of equal yelocity in a flow
(D) along which the pressure drop is uniform
(D) which occurs in all flows