Hydraulics and Fluid Mechanics - Mechanical Engineering Questions and Answers

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When the pressure intensity at a point is more than the local atmospheric pressure, then the difference of these two pressures is called

gauge pressure

absolute pressure

positive gauge pressure

vacuum pressure

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The hammer blow in pipes occurs when

there is excessive leakage in the pipe

the pipe bursts under high pressure of fluid

the flow of fluid through the pipe is suddenly brought to rest by closing of the valve

the flow of fluid through the pipe is gradually brought to rest by closing of the valve

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When a body is placed over a liquid, it will sink down if

gravitational force is equal to the upthrust of the liquid

gravitational force is less than the upthrust of the liquid

gravitational force is more than the upthrust of the liquid

none of the above

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When a cylindrical vessel of radius (r) containing liquid is revolved about its vertical axis Ï‰ rad/s, then depth of parabola which the liquid assumes is

\(\frac { \omega . r} { 2g }\)

\(\frac { \omega ^2 . r^2} { 2g }\)

\(\frac { \omega . r} { 4g }\)

\(\frac { \omega^2 . r^2} {4g }\)