Two dimensional flow occurs when________________?

A. The direction and magnitude of the velocity at all points are identical
B. The velocity of successive fluid particles, 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 plane

In a free vortex motion, the radial component of velocity everywhere is________________?

A. Maximum
B. Minimum
C. Zero
D. Non-zero and finite

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

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

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

The upper surface of a weir over which water flows is known is_____________________?

A. Crest
B. Nappe
C. Sill
D. Weir top

Hydrometer is used to determine____________________?

A. Specific gravity of liquids
B. Specific gravity of solids
C. Specific gravity of gases
D. Relative humidity

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

Mach number is significant in_____________________?

A. Supersonics, as with projectiles and jet propulsion
B. Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.
C. Simultaneous motion through two fluids where there is a surface of dis-continuity, gravity force, and wave making effects, as with ship’s hulls
D. All of fhe 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