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Hydraulic and Fluid Machines - Interview Questions and Answers

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111. A balloon lifting in air follows the following principle
A. law of gravitation
B. Archimedes principle
C. principle of buoyancy
D. all of the above
E. continuity equation.
Explanation:
112. Kinematic viscosity is dependent upon
A. pressure
B. distance
C. level
D. flow
E. density.
Explanation:
113. The bulk modulus of elasticity with increase in pressure
A. increases
B. decreases
C. remains constant
D. increases first upto certain limit and then decreases
E. unpredictable.
Explanation:
114. Poise is the unit of
A. surface tension
B. capillarity
C. viscosity
D. shear stress in fluids
E. buoyancy.
Explanation:
115. If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be
A. higher than the surface of liquid
B. the same as the surface of liquid
C. lower than the surface of liquid
D. unpredictable
E. none of the above.
Explanation:
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