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Recent questions tagged fluid-mechanics-and-thermal-science
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GATE ME 2013 | Question: 42
Two large diffuse gray parallel plates, separated by a small distance, have surface temperatures of $400$ $K$ and $300$ $K$. If the emissivities of the surfaces are $0.8$ and the Stefan-Boltzmann constant is $5.67$ × $10^{-8}$ $W$/$m^2$ $K^4$, the net radiation heat exchange rate in $kW$/$m^2$ between the two plates is $0.66$ $0.79$ $0.99$ $3.96$
Two large diffuse gray parallel plates, separated by a small distance, have surface temperatures of $400$ $K$ and $300$ $K$. If the emissivities of the surfaces are $0.8$...
piyag476
1.4k
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piyag476
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Feb 19, 2017
Heat Transfer
gateme-2013
fluid-mechanics-and-thermal-science
heat-transfer
stefan-boltzmann-constant
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0
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0
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GATE ME 2013 | Question: 30
A steel ball of diameter $60$ $mm$ is initially in thermal equilibrium at $1030^0C$ in a furnace. It is suddenly removed from the furnace and cooled in ambient air at $30^0C$, with convective heat transfer coefficient $h = 20 W/m^2K$. The thermo-physical ... required in seconds to cool the steel ball in air from $1030^0C$ to $430^0C$ is $519$ $931$ $1195$ $2144$
A steel ball of diameter $60$ $mm$ is initially in thermal equilibrium at $1030^0C$ in a furnace. It is suddenly removed from the furnace and cooled in ambient air at $30...
piyag476
1.4k
points
piyag476
asked
Feb 19, 2017
Heat Transfer
gateme-2013
fluid-mechanics-and-thermal-science
heat-transfer
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0
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0
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GATE ME 2013 | Question: 29
Water is coming out from a tap and falls vertically downwards. At the tap opening, the stream diameter is $20$ $mm$ with uniform velocity of $2$ $m/s$. Acceleration due to gravity is $9.81$ $m/s^2$. Assuming steady, inviscid flow, constant atmospheric pressure ... effects, the diameter in mm of the stream $0.5$ $m$ below the tap is approximately $10$ $15$ $20$ $25$
Water is coming out from a tap and falls vertically downwards. At the tap opening, the stream diameter is $20$ $mm$ with uniform velocity of $2$ $m/s$. Acceleration due t...
piyag476
1.4k
points
piyag476
asked
Feb 19, 2017
Fluid Mechanics
gateme-2013
fluid-mechanics-and-thermal-science
fluid-mechanics
flow-through-pipes
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0
answers
0
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GATE ME 2013 | Question: 28
Specific enthalpy and velocity of steam at inlet and exit of a steam turbine, running under steady state, are as given below: ... in $kW$ by the steam turbine per $kg$ of steam flow rate, is $901.2$ $911.2$ $17072.5$ $17082.5$
Specific enthalpy and velocity of steam at inlet and exit of a steam turbine, running under steady state, are as given below:$\begin{array}{ccc} & \underline{Specific \: ...
piyag476
1.4k
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piyag476
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Feb 19, 2017
Applications
gateme-2013
fluid-mechanics-and-thermal-science
applications
turbomachinery
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0
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0
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GATE ME 2013 | Question: 19
Consider one-dimensional steady state heat conduction along $x$-axis ($0 \leq x \leq L$), through a planewall with the boundary surfaces ($x = 0$ and $x = L$) maintained at temperatures of $0^{\circ} C$ and $100^{\circ}C$. ... . The temperature distribution is linear within the wall. The temperature distribution is symmetric about the mid-plane of the wall.
Consider one-dimensional steady state heat conduction along $x$-axis ($0 \leq x \leq L$), through a planewall with the boundary surfaces ($x = 0$ and $x = L$) maintained...
piyag476
1.4k
points
piyag476
asked
Feb 19, 2017
Heat Transfer
gateme-2013
fluid-mechanics-and-thermal-science
heat-transfer
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0
answers
0
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GATE ME 2013 | Question: 18
In order to have maximum power from a Pelton turbine, the bucket speed must be equal to the jet speed. equal to half of the jet speed. equal to twice the jet speed. independent of the jet speed.
In order to have maximum power from a Pelton turbine, the bucket speed must beequal to the jet speed.equal to half of the jet speed.equal to twice the jet speed.independe...
piyag476
1.4k
points
piyag476
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Feb 19, 2017
Applications
gateme-2013
fluid-mechanics-and-thermal-science
applications
pelton-wheel
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0
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0
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GATE ME 2013 | Question: 9
Consider one-dimensional steady state heat conduction, without heat generation, in a plane wall; with boundary conditions as shown in the figure below. The conductivity of the wall is given by $k$ = $k_0$ + $bT$ ; where $k_0$ and $b$ are positive ... $x$ increases, the temperature gradient ( $dT$/ $dx$ ) will remain constant be zero increase decrease
Consider one-dimensional steady state heat conduction, without heat generation, in a plane wall; with boundary conditions as shown in the figure below. The conductivity o...
piyag476
1.4k
points
piyag476
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Feb 19, 2017
Heat Transfer
gateme-2013
fluid-mechanics-and-thermal-science
heat-transfer
heat-conduction
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0
answers
0
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GATE ME 2013 | Question: 8
The pressure, dry bulb temperature and relative humidity of air in a room are $1$ bar, $30^{\circ} C$ and $70\%$, respectively. If the saturated steam pressure at $30^{\circ} C$ is $4.25$ $kPa$, the specific humidity of the room air in $kg$ water $\text{vapour/kg}$ dry air is $0.0083$ $0.0101$ $0.0191$ $0.0232$
The pressure, dry bulb temperature and relative humidity of air in a room are $1$ bar, $30^{\circ} C$ and $70\%$, respectively. If the saturated steam pressure at $30^{\c...
piyag476
1.4k
points
piyag476
asked
Feb 19, 2017
Heat Transfer
gateme-2013
fluid-mechanics-and-thermal-science
heat-transfer
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