Hydraulic and Fluid Machines - Interview Questions | Exam2Win

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31. During the opening of a valve in a pipe line, the flow is

A. steady

B. unsteady

C. uniform

D. laminar

E. free vortex type.

Explanation:

32. Non uniform 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 aricf 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:

33. Select the correct statement

A. Local atmospheric pressure depends upon elevation of locality only

B. Standard atmospheric pressure is the mean local atmospheric pressure a* sea level

C. Local atmospheric pressure is always below standard atmospheric pressure

D. A barometer reads the difference be-tween local and standard atmospheric pressure

E. Gauge piessure is equal to atmos�pheric pressure plus instrument read�ing.

Explanation:

34. Steady 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:

35. Property of a fluid by which its own molecules are attracted is called

A. adhesion

B. cohesion

C. viscosity

D. compressibility

E. surface tension.

Explanation: