Recent questions tagged fluid-mechanics / GO Mechanical

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GATE2020-ME-2: 14
Which of the following conditions is used to determine the stable equilibrium of all partially submerged floating bodies? Centre of buoyancy must be above the centre of gravity Centre of buoyancy must be below the centre of gravity Metacentre must be at a higher level than the centre of gravity Metacentre must be at a lower level than the centre of gravity

Which of the following conditions is used to determine the stable equilibrium of all partially submerged floating bodies?Centre of buoyancy must be above the centre of gr...

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go_editor asked Sep 18, 2020

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GATE2020-ME-2: 16
A closed vessel contains pure water, in thermal equilibrium with its vapour at $25^\circ C$(Stage$\#1$ ... Valve $A$ Nothing will happen - the vessel will continue to remain in equilibrium All the vapor inside the vessel will immediately condense

A closed vessel contains pure water, in thermal equilibrium with its vapour at $25^\circ C$(Stage$\#1$), as shown.The vessel in this stage is then kept aside an isotherma...

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go_editor asked Sep 18, 2020

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GATE2020-ME-2: 49
Water (density $1000 \: kg/m^3$) flows through an inclined pipe of uniform diameter. The velocity, pressure and elevation at section $\textbf{A}$ are $V_A=3.2 \: m/s, \: p_A=186 \text{kPa}$ and $z_A=24.5 \: m$ ... acceleration due to gravity is $10 \: m/s^2$ then the head lost due to friction is ________ $m$ (round off to one decimal place)

Water (density $1000 \: kg/m^3$) flows through an inclined pipe of uniform diameter. The velocity, pressure and elevation at section $\textbf{A}$ are $V_A=3.2 \: m/s, \: ...

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GATE2020-ME-2: 51
Water flows through a tube of $3$ cm internal diameter and length $20$ m. The outside surface of the tube is heated electrically so that it is subjected to uniform heat flux circumferentially and axially. The mean inlet and exit temperatures of the water are ... The inner surface temperature at the exit section of the tube is ___________ $^\circ C$ (round off to one decimal place

Water flows through a tube of $3$ cm internal diameter and length $20$ m. The outside surface of the tube is heated electrically so that it is subjected to uniform heat f...

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go_editor asked Sep 18, 2020

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GATE2020-ME-1: 14
Froude number is the ratio of buoyancy forces to viscous forces inertia forces to viscous forces buoyancy forces to inertia forces inertia forces to gravity forces

Froude number is the ratio ofbuoyancy forces to viscous forcesinertia forces to viscous forcesbuoyancy forces to inertia forcesinertia forces to gravity forces

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go_editor asked Feb 19, 2020

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GATE2020-ME-1: 15
Match the following non-dimensional numbers with the corresponding definitions: ... $P-3, Q-1, R-2, S-4$ $P-4, Q-3, R-1, S-2$ $P-3, Q-1, R-4, S-2$

Match the following non-dimensional numbers with the corresponding definitions:$\begin{array}{|c|c|c|cI|} \hline {} & \textbf{Non-dimensional number} & {} & \textbf{Def...

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go_editor asked Feb 19, 2020

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GATE2020-ME-1: 16
The velocity field of an incompressible flow in a Cartesian system is represented by $\overrightarrow{V}=2\left ( x^{2}-y^{2} \right )\widehat{i}+v\widehat{j}+3\widehat{k}$ Which one of the following expressions for $v$ is valid? $-4xz + 6xy$ $ – 4xy – 4xz$ $4xz – 6xy$ $4xy + 4xz$

The velocity field of an incompressible flow in a Cartesian system is represented by$$\overrightarrow{V}=2\left ( x^{2}-y^{2} \right )\widehat{i}+v\widehat{j}+3\widehat{k...

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GATE2020-ME-1: 49
Consider steady, viscous, fully developed flow of a fluid through a circular pipe of internal diameter $\text{D}$. We know that the velocity profile forms a paraboloid about the pipe centre line, given by: $V=-C\left(r^{2}-\dfrac{D^{2}}{4}\right) m/s$ ... the control surface $\text{A-B}$, as shown in the figure, is proportional to $D^{n}$. The value of $n$ is ________.

Consider steady, viscous, fully developed flow of a fluid through a circular pipe of internal diameter $\text{D}$. We know that the velocity profile forms a paraboloid ab...

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GATE2020-ME-1: 50
Air discharges steadily through a horizontal nozzle and impinges on a stationary vertical plate as shown in figure. The inlet and outlet areas of the nozzle are $0.1\:m^{2}\:\text{and}\:0.02\:m^{2}$ ... is $0.36\:kPa$, the gauge pressure at point $O$ on the plate is __________ $kPa$ (round off to two decimal places).

Air discharges steadily through a horizontal nozzle and impinges on a stationary vertical plate as shown in figure. The inlet and outlet areas of the nozzle are $...

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go_editor asked Feb 19, 2020

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GATE2019 ME-2: 9
A two-dimensional incompressible frictionless flow field is given by $\overrightarrow{u} = x \hat{i} – y \hat{j}$. If $\rho$ is the density of the fluid, the expression for pressure gradient vector at any point in the flow field is given as $\rho(x \hat{i}+y \hat{j})$ $ – \rho(x \hat{i}+y \hat{j})$ $\rho(x \hat{i} – y \hat{j})$ $ – \rho(x^2 \hat{i}+y^2 \hat{j})$

A two-dimensional incompressible frictionless flow field is given by $\overrightarrow{u} = x \hat{i} – y \hat{j}$. If $\rho$ is the density of the fluid, the expression...