162. In a free vortex motion, the radial component of velocity everywhere is
A.Maximum
B.Minimum
C.Zero
D.Non-zero and finite
163. In a forced vortex, the velocity of flow everywhere within the fluid is
A.Maximum
B.Minimum
C.Zero
D.Non-zero finite
164. The region between the separation streamline and the boundary surface of the solid body is known as
A.Wake
B.Drag
C.KC) lift
D.Boundary layer
165. For hypersonic flow, the Mach number is
A.Unity
B.Greater than unity
C.Greater than 2
D.Greater than 4
166. The upper surface of a weir over which water flows is known is
A.Crest
B.Nappe
C.Sill
D.Weir top
167. Normal depth in open channel flow is the depth of flow corresponding to
A.Steady flow
B.Unsteady flow
C.Laminar flow
D.Uniform flow
168. Velocity distribution in the turbulent 'boundary layer follows following law
A.Linear
B.Square
C.Parabola
D.Logarithmic
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