Fluid Mechanics Sheet 20
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1) Question.
At a point on a streamline, the velocity is 3 m/s and the radius of curvature is 9 m. If the rate of increase of velocity along the streamline at this point is 1/3 m/s/m, then the total acceleration at this point would be -
Answer. -
2) Question.
If u and v are the components of velocity in the x and y directions of a flow given by
u=ax+by; v=cx+dy
then the condition to be satisfied is -
Answer. -
3) Question.
The boundary layer thickness at a distance of 1 m from the leading edge of a flat plate, kept at zero angle of incidence to the flow direction, is 0.1 cm. The velocity outside the boundary layer is 25 m/sec. The boundary layer thickness at a distance -
[ Assume that boundary layer is entirely laminar]
Answer. -
4) Question.
Which of the following statements is correct ?
Answer. -
5) Question.
Select the incorrect statement.
Answer. -
6) Question.
Which of the following velocity potentials satisfies continuity equation ?
Answer. -
7) Question.
In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is -
Answer. -
8) Question.
A vertical triangular area with vertex downward and altitude 'h' has its base lying on the free surface of a liquid. The centre of pressure below the free surface is at a distance of -
Answer. -
9) Question.
An open tank contains 1 m deep water with 50 cm depth of oil of specific gravity 0.8 above it. The intensity of pressure at the bottom of tank will be -
Answer.
