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Hydraulic and Fluid Machines - Interview Questions and Answers

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151. The process of diffusion of one liquid into the other through a semi-permeable membrane is called
A. viscosity
B. osmosis
C. surface tension
D. cohesion
E. diffusivity.
Explanation:
152. A fluid is said to be ideal, if it is
A. incompressible
B. inviscous
C. viscous and incompressible
D. inviscous and compressible
E. inviscous and incompressible.
Explanation:
153. The atmospheric pressure with rise in altitude decreases
A. linearly
B. first slowly and then steeply
C. first steeply and then gradually
D. unpredictable
E. none of the above.
Explanation:
154. The resultant of all normal pressures acts
A. at e.g. of body
B. at centre of pressure
C. vertically upwards
D. at metacentre
E. vertically downwards.
Explanation:
155. In order to increase sensitivity of U-tube manometer, one leg is usually inclined by angle 9. Sensitivity of inclined tube to sensitivity of U-tube is equal to
A. sin 9
B. sin 9
C. casS
D. cos 9
E. tan 9.
Explanation:
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