Hydraulic and Fluid Machines - Interview Questions | Exam2Win

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36. Gradually varied flow is

A. steady uniform

B. non-steady non-uniform

C. non-steady uniform

D. steady non-uniform

E. true one-dimensional.

Explanation:

37. True one-dimensional flow occurs when

A. the direction and magnitude of the veiocity 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:

38. The pressure in the air space above an oil (sp. gr. 0. surface in a tank is 0.1 kg/cm". The pressure at 2.5 m below the oil surface will be

A. 2 metres of water column

B. 3 metres of water column

C. 3.5 metres of water column

D. 4 m of water column

E. none of the above.

Explanation:

39. Rotameter is a device used to measure

A. absolute pressure

B. velocity of fluid

C. flow

D. rotation

E. velocity of air.

Explanation:

40. For measuring flow by a venturimeter, if should be installed in

A. vertical line

B. horizontal line

C. inclined line with flow downward

D. inclined line with upward flow\

E. in any direction and in any location.

Explanation: