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Hydraulic and Fluid Machines - Interview Questions and Answers

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156. Centre of buoyancy is the
A. centroid of the displaced volume of fluid
B. centre of pressure of displaced volume
C. e.g. of floating 'body
D. does not exist
E. none of the above.
Explanation:
157. . The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the sub-merged body is called
A. upthrust
B. reaction
C. buoyancy
D. metacentre
E. centre of pressure.
Explanation:
158. Dynamic viscosity of most of the liquids with rise in temperature
A. increases
B. decreases
C. remains unaffected
D. unpredictable
E. none of the above.
Explanation:
159. Piezometer is used to measure
A. pressure in pipe, channels etc.
B. atmospheric pressure
C. very low pressures
D. difference of pressure between two points
E. flow.
Explanation:
160. Dynamic viscosity of most of the gases with rise in temperature
A. increases
B. decreases
C. remains unaffected
D. unpredictable
E. none of the above.
Explanation:
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