Hydraulic and Fluid Machines - Interview Questions | Exam2Win

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61. Froude number is significant in

A. supersonics, as with projectile 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 forces, and wave making effect, as with ship's hulls

D. all of the above

E. none of the above

Explanation:

62. A large Roynold number is indication of

A. smooth and streamline flow

B. laminar flow

C. steady flow

D. turbulent flow

E. highly turbulent flow.

Explanation:

63. Reynolds number is significant in

A. supersonics, as with projectile 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 forces, and wave making effect, as with ship's hulls

D. all of the above

E. none of the above.

Explanation:

64. In a free vortex motion, the radial component of velocity everywhere is

A. maximum

B. minimum

C. zero

D. non-zero and finite

E. unpredictable.

Explanation:

65. Two dimensional 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 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

E. velocity, depth, pressure, etc. change from point to point in the fluid flow.

Explanation: