Fluid Machines - Interview Questions | Exam2Win

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21. In a forced vortex motion, the velocity of flow is

A. directly proportional to its radial distance from axis of rotation

B. inversely proportional to its radial distance from the axis of rotation

C. inversely proportional to the square of its radial distance from the axis of rotation

D. directly proportional to the square of its radial distance from the axis of rotation

Explanation:

22. Stream lines and path lines always coincide in case of

A. steady flow

B. laminar flow

C. uniform flow

D. turbulent flow

Explanation:

23. When a liquid rotates at a constant angular velocity about a vertical axis as a rigid body, the pressure intensity varies

A. linearly with radial distance

B. as the square of the radial distance

C. inversely as the square of the radial distance

D. inversely as the radial distance

Explanation:

24. The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid

A. steady flow

B. uniform flow

C. incompressible flow

D. frictionless flow

Explanation:

25. Which of the following is an incorrect statement ?

A. Coefficient of contraction of a venturimeter is unity.

B. Flow nozzle is cheaper than venturimeter but has higher energy loss.

C. Discharge is independent of orientation of venturimeter whether it is horizontal, vertical or inclined.

D. None of the above statement is correct.

Explanation: