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Most viewed questions in Fluid Mechanics and Thermal Sciences
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GATE2018-1-9
For a wo-dimensional incompressible flow field given by $\overrightarrow{u} = A(x \hat{i} - y \hat{j}), \text{ where } A>0$, which one of the following statements is FALSE? It satisfies continuity equation It is unidirectional when $x \rightarrow 0$ and $y \rightarrow \infty$ Its streamlines are given by $x=y$ It is irrotational
For a wo-dimensional incompressible flow field given by $\overrightarrow{u} = A(x \hat{i} - y \hat{j}), \text{ where } A>0$, which one of the following statements is FALS...
Arjun
28.5k
points
Arjun
asked
Feb 17, 2018
Fluid Mechanics
gateme-2018-set1
fluid-mechanics
fluid-mechanics-and-thermal-science
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–
0
answers
0
votes
GATE2019 ME-2: 10
Sphere $1$ with a diameter of $0.1$ m is completely enclosed by another sphere $2$ of diameter $0.4$m. The view factor $F_{12}$ is $0.0625$ $0.25$ $0.5$ $1.0$
Sphere $1$ with a diameter of $0.1$ m is completely enclosed by another sphere $2$ of diameter $0.4$m. The view factor $F_{12}$ is$0.0625$$0.25$$0.5$$1.0$
Arjun
28.5k
points
Arjun
asked
Feb 9, 2019
Heat Transfer
gateme-2019-set2
view-factors
heat-transfer
fluid-mechanics-and-thermal-science
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–
0
answers
0
votes
GATE2018-1-43
A solid block of $2.0 \: kg$ mass slides steadily at a velocity $V$ along a vertical wall as shown in the figure below. A thin oil film of thickness $h=0.15 \: mm$ provides lubrication between the block and the wall. The surface area of the face of the block ... $V$ (in $m/s$) of the block is ______ (correct to one decimal place)
A solid block of $2.0 \: kg$ mass slides steadily at a velocity $V$ along a vertical wall as shown in the figure below. A thin oil film of thickness $h=0.15 \: mm$ provid...
Arjun
28.5k
points
Arjun
asked
Feb 17, 2018
Fluid Mechanics
gateme-2018-set1
numerical-answers
fluid-mechanics
fluid-mechanics-and-thermal-science
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–
0
answers
0
votes
GATE2018-1-24
For a Pelton wheel with a given water jet velocity, the maximum output power from the Pelton wheel is obtained when the ratio of the bucket speed to the water jet speed is _____ (correct to two decimal places)
For a Pelton wheel with a given water jet velocity, the maximum output power from the Pelton wheel is obtained when the ratio of the bucket speed to the water jet speed i...
Arjun
28.5k
points
Arjun
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Feb 17, 2018
Applications
gateme-2018-set1
numerical-answers
fluid-mechanics-and-thermal-science
applications
pelton-wheel
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0
answers
0
votes
GATE Mechanical 2014 Set 3 | Question: 43
A siphon is used to drain water from a large tank as shown in the figure below. Assume that the level of water is maintained constant. Ignore frictional effect due to viscosity and losses at entry,and exit. At the exit of the siphon, the velocity of water is $\sqrt{2g(Z_Q-Z_R)} \\$ $\sqrt{2g(Z_P-Z_R)} \\$ $\sqrt{2g(Z_O-Z_R)} \\$ $\sqrt{2gZ_Q}$
A siphon is used to drain water from a large tank as shown in the figure below. Assume that the level of water is maintained constant. Ignore frictional effect due to vis...
Arjun
28.5k
points
Arjun
asked
Feb 19, 2017
Fluid Mechanics
gateme-2014-set3
fluid-mechanics-and-thermal-science
fluid-mechanics
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–
0
answers
0
votes
GATE2019 ME-1: 24
Air of mass $1$ kg, initially at $300$ K and $10$ bar, is allowed to expand isothermally till it reaches a pressure of $1$ bar. Assuming air as an ideal gas with gas constant of $0.287 \: kJ/kg.K$, the change in entropy of air (in $kJ/kg.K$, round off to two decimal places) is ______
Air of mass $1$ kg, initially at $300$ K and $10$ bar, is allowed to expand isothermally till it reaches a pressure of $1$ bar. Assuming air as an ideal gas with gas cons...
Arjun
28.5k
points
Arjun
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Feb 9, 2019
Thermodynamics
gateme-2019-set1
numerical-answers
fluid-mechanics-and-thermal-science
thermodynamics
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0
answers
0
votes
GATE2019 ME-1: 48
If one mole of $H_2$ has occupies a rigid container with a capacity of $1000$ litres and the temperature is raised from $27^{\circ} C$ to $37^{\circ} C$, the change in pressure of the contained gas (round off to two decimal places), assuming ideal gas behaviour, is _______ Pa. $(R=8.314 \: J/mol \cdot K)$
If one mole of $H_2$ has occupies a rigid container with a capacity of $1000$ litres and the temperature is raised from $27^{\circ} C$ to $37^{\circ} C$, the change in pr...
Arjun
28.5k
points
Arjun
asked
Feb 9, 2019
Thermodynamics
gateme-2019-set1
numerical-answers
fluid-mechanics-and-thermal-science
thermodynamics
+
–
0
answers
0
votes
GATE2016-2-14
Assuming constant temperature condition and air to be an ideal gas, the variation in atmospheric pressure with height calculated from fluid statics is linear exponential quadratic cubic
Assuming constant temperature condition and air to be an ideal gas, the variation in atmospheric pressure with height calculated from fluid statics islinearexponentialqua...
Arjun
28.5k
points
Arjun
asked
Feb 24, 2017
Applications
gateme-2016-set2
fluid-mechanics-and-thermal-science
applications
vapour-and-gas-power-cycles
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–
0
answers
0
votes
GATE ME 2012 | Question: 30
An incompressible fluid flows over a flat plate with zero pressure gradient. The boundary layer thickness is $1$ mm at a location where the Reynolds number is $1000$. If the velocity of the fluid alone is increased by a factor of $4$, then the boundary layer thickness at the same location, in mm will be $4$ $2$ $0.5$ $0.25$
An incompressible fluid flows over a flat plate with zero pressure gradient. The boundary layer thickness is $1$ mm at a location where the Reynolds number is $1000$. If ...
Andrijana3306
1.5k
points
Andrijana3306
asked
Mar 19, 2018
Fluid Mechanics
gateme-2012
fluid-mechanics-and-thermal-science
fluid-mechanics
boundary-layer
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–
0
answers
0
votes
GATE2015-3-52
Which of the following statements are TRUE, when the cavitation parameter $\sigma =0$? the local pressure is reduced to vapor pressure cavitation starts boiling of liquid starts cavitation stops (i), (ii) and (iv) only (ii) and (iii) only (i) and (iii) (i), (ii) and (iii)
Which of the following statements are TRUE, when the cavitation parameter $\sigma =0$?the local pressure is reduced to vapor pressurecavitation startsboiling of liquid st...
Arjun
28.5k
points
Arjun
asked
Feb 24, 2017
Applications
gateme-2015-set3
fluid-mechanics-and-thermal-science
applications
vapour-and-gas-power-cycles
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–
0
answers
0
votes
GATE Mechanical 2014 Set 1 | Question: 41
$1.5$ kg of water is in saturated liquid state at $2$ bar $(vf = 0.001061 \: m^3/kg, uf = 504.0 \: kJ/kg,$ $hf = 505 kJ/kg$). Heat is added in a constant pressure process till the temperature of water reaches $400^ \circ C (v = 1.5493 \: m^3/kg, u = 2967.0 kJ/kg,$ $h = 3277.0 \: kJ/kg)$. The heat added (in $kJ$) in the process is _______
$1.5$ kg of water is in saturated liquid state at $2$ bar $(vf = 0.001061 \: m^3/kg, uf = 504.0 \: kJ/kg,$ $hf = 505 kJ/kg$). Heat is added in a constant pressure proces...
Arjun
28.5k
points
Arjun
asked
Feb 19, 2017
Heat Transfer
gateme-2014-set1
numerical-answers
fluid-mechanics-and-thermal-science
heat-transfer
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–
0
answers
0
votes
GATE2019 ME-1: 46
A cube of side $100 \: mm$ is placed at the bottom of an empty container on one of its faces. The density of the material of the cube is $800 \: kg/m^3$. Liquid of density $1000 \: kg/m^3$ is now poured into the container. The minimum height to which the liquid needs to be poured into the container for the cube to just lift up is __________$mm$.
A cube of side $100 \: mm$ is placed at the bottom of an empty container on one of its faces. The density of the material of the cube is $800 \: kg/m^3$. Liquid of densit...
Arjun
28.5k
points
Arjun
asked
Feb 9, 2019
Fluid Mechanics
gateme-2019-set1
numerical-answers
fluid-mechanics-and-thermal-science
fluid-mechanics
+
–
0
answers
0
votes
GATE2020-ME-1: 55
The indicated power developed by an engine with compression ratio of $8$, is calculated using an air-standard Otto cycle (constant properties). The rate of heat addition is $10\: kW$ ... of the engine is $80$ percent. The brake power output of the engine is _________$kW$ (round off to one decimal place).
The indicated power developed by an engine with compression ratio of $8$, is calculated using an air-standard Otto cycle (constant properties). The rate of heat addition ...
go_editor
5.0k
points
go_editor
asked
Feb 19, 2020
Thermodynamics
gateme-2020-set1
numerical-answers
fluid-mechanics-and-thermal-science
thermodynamics
i.c-engines
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–
0
answers
0
votes
GATE2019 ME-1: 9
For a hydrodynamically and thermally fully developed laminar flow through a circular pipe of constant cross-section, the Nusselt number at constant wall heat flux $(Nu_q)$ and that at constant wall temperature $(Nu_T)$ are related as $Nu_q > Nu_T$ $Nu_q < Nu_T$ $Nu_q = Nu_T$ $Nu_q = (Nu_T)^2$
For a hydrodynamically and thermally fully developed laminar flow through a circular pipe of constant cross-section, the Nusselt number at constant wall heat flux $(Nu_q...
Arjun
28.5k
points
Arjun
asked
Feb 9, 2019
Fluid Mechanics
gateme-2019-set1
fluid-mechanics-and-thermal-science
fluid-mechanics
flow-through-pipes
+
–
0
answers
0
votes
GATE2016-1-46
An ideal gas undergoes a reversible process in which the pressure varies linearly with volume. The conditions at the start (subscript $1$) and at the end (subscript $2$) of the process with usual notation are: $p_1 = 100 \: kPa$, $V_1 = 0.2 \: m^3$ ... $R=0.275\:kJ/kg-K$. The magnitude of the work required for the process (in $kJ$) is ________
An ideal gas undergoes a reversible process in which the pressure varies linearly with volume. The conditions at the start (subscript $1$) and at the end (subscript $2$) ...
Arjun
28.5k
points
Arjun
asked
Feb 24, 2017
Applications
gateme-2016-set1
numerical-answers
fluid-mechanics-and-thermal-science
applications
vapour-and-gas-power-cycles
+
–
0
answers
0
votes
GATE Mechanical 2014 Set 3 | Question: 46
At the inlet of an axial impulse turbine rotor, the blade linear speed is $25 \: m/s$, the magnitude of absolute velocity is $100 \: m/s$ and the angle between them is $25^{\circ}$. The relative velocity and the axial component ... blade inlet and outlet velocity triangles are shown in the figure. Assuming no losses, the specific work (in $J/kg$) is _______
At the inlet of an axial impulse turbine rotor, the blade linear speed is $25 \: m/s$, the magnitude of absolute velocity is $100 \: m/s$ and the angle between them is $2...
Arjun
28.5k
points
Arjun
asked
Feb 19, 2017
Applications
gateme-2014-set3
numerical-answers
fluid-mechanics-and-thermal-science
applications
turbomachinery
+
–
0
answers
0
votes
GATE2015-2-14
Within a boundary layer for a steady incompressible flow, the Bernoulli equation holds because the flow is steady holds because the flow is incompressible holds because the flow is transitional does not hold because the flow is frictional
Within a boundary layer for a steady incompressible flow, the Bernoulli equationholds because the flow is steadyholds because the flow is incompressibleholds because the ...
Arjun
28.5k
points
Arjun
asked
Feb 24, 2017
Fluid Mechanics
gateme-2015-set2
bernoulli's-equation
fluid-mechanics
fluid-mechanics-and-thermal-science
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–
0
answers
0
votes
GATE ME 2012 | Question: 31
A room contains $35$ kg of dry air and $0.5$ kg of water vapor. The total pressure and temperature of air in the room are $100$ kPa and $25^{\circ}$C respectively. Given that the saturation pressure for water at $25^{\circ}$ C is $3.17$ kPa, the relative humidity of the air in the room is $67 \%$ $55 \%$ $83 \%$ $71 \%$
A room contains $35$ kg of dry air and $0.5$ kg of water vapor. The total pressure and temperature of air in the room are $100$ kPa and $25^{\circ}$C respectively. Given ...
Andrijana3306
1.5k
points
Andrijana3306
asked
Mar 19, 2018
Applications
gateme-2012
fluid-mechanics-and-thermal-science
applications
+
–
0
answers
0
votes
GATE2015-3-36
A Prandtl tube (Pitot-static tube with $C$=$1$) is used to measure the velocity of water. The differential manometer reading is $10$ $mm$ of liquid column with a relative density of $10$. Assuming $g$ = $9.8$ $m$/$s^2$, the velocity of water (in $m/s$) is ________
A Prandtl tube (Pitot-static tube with $C$=$1$) is used to measure the velocity of water. The differential manometer reading is $10$ $mm$ of liquid column with a relative...
Arjun
28.5k
points
Arjun
asked
Feb 24, 2017
Fluid Mechanics
gateme-2015-set3
numerical-answers
fluid-mechanics-and-thermal-science
fluid-mechanics
+
–
0
answers
0
votes
GATE2017 ME-2: 17
Consider a laminar flow at zero incidence over a flat plate. The shear stress at the wall is denoted by $\tau _{w}$. The axial positions $x_{1}$ and $x_{2}$ on the plate are measured from the leading edge in the direction of flow. If $x_{2} > x_{1}$ ... $\tau _{w}\mid _{x_{1}} < \tau _{w}\mid _{x_{2}}$
Consider a laminar flow at zero incidence over a flat plate. The shear stress at the wall is denoted by $\tau _{w}$. The axial positions $x_{1}$ and $x_{2}$ on the plate ...
Arjun
28.5k
points
Arjun
asked
Feb 26, 2017
Fluid Mechanics
gateme-2017-set2
fluid-mechanics-and-thermal-science
fluid-mechanics
+
–
0
answers
0
votes
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...
go_editor
5.0k
points
go_editor
asked
Sep 18, 2020
Fluid Mechanics
gateme-2020-set2
stability-of-floating-bodies
fluid-mechanics
fluid-mechanics-and-thermal-science
+
–
1
answers
1
votes
Self doubt
With increase in pressure the bulk modulus of elasticity__?
With increase in pressure the bulk modulus of elasticity__?
Ak123456
130
points
Ak123456
asked
May 9, 2020
0
answers
0
votes
GATE2020-ME-1: 24
The compressor of a gas turbine plant, operating on an ideal intercooled Brayton cycle, accomplishes an overall compression ratio of $6$ in a two-stage compression process. Intercooling is used to cool the air coming out from the first stage to the ... gas are constant, the intercooling pressure for minimum compressor work is __________ $kPa$ (rounded off to $2$ decimal places).
The compressor of a gas turbine plant, operating on an ideal intercooled Brayton cycle, accomplishes an overall compression ratio of $6$ in a two-stage compression proces...
go_editor
5.0k
points
go_editor
asked
Feb 19, 2020
Applications
gateme-2020-set1
numerical-answers
fluid-mechanics-and-thermal-science
applications
turbomachinary
+
–
0
answers
0
votes
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
+
–
0
answers
0
votes
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, \: ...
go_editor
5.0k
points
go_editor
asked
Sep 18, 2020
Fluid Mechanics
gateme-2020-set2
numerical-answers
fluid-mechanics
fluid-mechanics-and-thermal-science
+
–
0
answers
0
votes
GATE2020-ME-2: 6
A circular disk of radius $r$ is confined to roll without slipping at $P$ and $Q$ as shown in the figure. If the plates have velocities as shown, the magnitude of angular velocity of the disk is $\dfrac{V}{r} \\$ $\dfrac{V}{2r} \\$ $\dfrac{2V}{3r} \\$ $\dfrac{3V}{2r} $
A circular disk of radius $r$ is confined to roll without slipping at $P$ and $Q$ as shown in the figure.If the plates have velocities as shown, the magnitude of angular ...
go_editor
5.0k
points
go_editor
asked
Sep 18, 2020
Applications
gateme-2020-set2
velocity-diagrams
applications
fluid-mechanics-and-thermal-science
+
–
0
answers
0
votes
GATE2019 ME-1: 23
Water flows through a pipe with a velocity given by $\overrightarrow{V}= \bigg( \dfrac{4}{t}+x+y \bigg) \hat{j} \: m/s$, where $\hat{j}$ is the unit vector in the $y$ direction, $t(>0)$ is in seconds, and $x$ and $y$ are in meters. The magnitude of total acceleration at the point $(x,y)=(1,1)$ at $t=2\: s$ is ______$m/s^2$
Water flows through a pipe with a velocity given by $\overrightarrow{V}= \bigg( \dfrac{4}{t}+x+y \bigg) \hat{j} \: m/s$, where $\hat{j}$ is the unit vector in the $y$ dir...
Arjun
28.5k
points
Arjun
asked
Feb 9, 2019
Fluid Mechanics
gateme-2019-set1
numerical-answers
fluid-mechanics-and-thermal-science
fluid-mechanics
flow-through-pipes
+
–
0
answers
0
votes
GATE2017 ME-2: 46
In a counter-flow heat exchanger, water is heated at the rate of $1.5 \: kg/s$ from $40^{\circ}$ C to $80^{\circ} \: C$ by an oil entering at $120^{\circ}$ C and leaving at $60 ^{\circ}$ C. The specific heats of water and oil are $4.2 \: kJ/kg.K$ and ... transfer coefficient is $400 W/m^{2}.K$. The required heat transfer surface area (in $m^{2}$) is $0.104$ $0.022$ $10.4$ $21.84$
In a counter-flow heat exchanger, water is heated at the rate of $1.5 \: kg/s$ from $40^{\circ}$ C to $80^{\circ} \: C$ by an oil entering at $120^{\circ}$ C and leaving ...
Arjun
28.5k
points
Arjun
asked
Feb 26, 2017
Heat Transfer
gateme-2017-set2
fluid-mechanics-and-thermal-science
heat-transfer
heat-exchanger
+
–
0
answers
0
votes
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
points
piyag476
asked
Feb 19, 2017
Heat Transfer
gateme-2013
fluid-mechanics-and-thermal-science
heat-transfer
stefan-boltzmann-constant
+
–
0
answers
0
votes
GATE2018-2-41
A $0.2 \:m$ thick infinite black plate having a thermal conductivity of $3.96 \: W/m-K$ is exposed to two infinite black surfaces at $300 \: K$ and $400 \: K$ as shown in the figure. At steady state, the surface temperature of the plate facing the ... $1-D$ heat conduction, the magnitude of the heat flux through the place (in $W/m^2$) is ___________ (correct to two decimal places)
A $0.2 \:m$ thick infinite black plate having a thermal conductivity of $3.96 \: W/m-K$ is exposed to two infinite black surfaces at $300 \: K$ and $400 \: K$ as shown in...
Arjun
28.5k
points
Arjun
asked
Feb 17, 2018
Heat Transfer
gateme-2018-set2
numerical-answers
+
–
0
answers
0
votes
ISRO2009-7
A metallic cube of side $10 \;\text{cm}$, density $6.8 \: gm/cc$ is floating in liquid mercury (density $13.6 \: \text{gm/cc}$), with $5 \;\text{cm}$ height of cube exposed above the mercury level. Water (density $1 \: \text{gm/cc}$) is filled over this, to submerge the cube ... of cube exposed above mercury level is $4.6 \;\text{cm}$ $5.4 \;\text{cm}$ $5.0 \;\text{cm}$ $5.8 \;\text{cm}$
A metallic cube of side $10 \;\text{cm}$, density $6.8 \: gm/cc$ is floating in liquid mercury (density $13.6 \: \text{gm/cc}$), with $5 \;\text{cm}$ height of cube expos...
m2n037
940
points
m2n037
asked
Mar 6, 2018
Fluid Mechanics
isro2009
+
–
0
answers
0
votes
GATE Mechanical 2014 Set 4 | Question: 47
Steam with specific enthalpy $(h)$ $3214$ $kJ/kg$ enters an adiabatic turbine operating at steady state with a flow rate $10$ $kg/s$. As it expands, at a point where h is $2920$ $kJ/kg$, $1.5$ $kg/s$ is extracted for heating ... = $2374$ $kJ/kg$. Neglecting changes in kinetic and potential energies, the net power output (in $kW$) of the turbine is _______
Steam with specific enthalpy $(h)$ $3214$ $kJ/kg$ enters an adiabatic turbine operating at steady state with a flow rate $10$ $kg/s$. As it expands, at a point where h is...
Arjun
28.5k
points
Arjun
asked
Feb 19, 2017
Applications
gateme-2014-set4
numerical-answers
fluid-mechanics-and-thermal-science
applications
turbomachinery
+
–
0
answers
0
votes
GATE2020-ME-1: 34
A small metal bead $(\text{radius}\: 0.5\: mm)$, initially at $100^{\circ}C$ , when placed in a stream of fluid at $20^{\circ}C$ , attains a temperature of $28^{\circ}C$ in $4.35$ ... heat transfer coefficient $(in\:W/m^{2}.K)$ between the metal bead and the fluid stream is $283.3$ $299.8$ $149.9$ $449.7$
A small metal bead $(\text{radius}\: 0.5\: mm)$, initially at $100^{\circ}C$ , when placed in a stream of fluid at $20^{\circ}C$ , attains a temperature of $28^{\circ}C$ ...
go_editor
5.0k
points
go_editor
asked
Feb 19, 2020
Heat Transfer
gateme-2020-set1
fluid-mechanics-and-thermal-science
heat-transfer
+
–
0
answers
0
votes
GATE2015-3-45
A bullet spins as the shot is fired from a gun. For this purpose, two helical slots as shown in the figure are cut in the barrel. Projections $A$ and $B$ on the bullet engage in each of the slots. Helical slots are such that one turn of helix is completed over a ... $m$. If velocity of bullet when it exits the barrel is $20$ $m/s$, its spinning speed in $rad/s$ is ________
A bullet spins as the shot is fired from a gun. For this purpose, two helical slots as shown in the figure are cut in the barrel. Projections $A$ and $B$ on the bullet en...
Arjun
28.5k
points
Arjun
asked
Feb 24, 2017
Applications
gateme-2015-set3
numerical-answers
velocity-diagrams
applications
fluid-mechanics-and-thermal-science
+
–
0
answers
0
votes
GATE Mechanical 2014 Set 4 | Question: 42
A plane wall has a thermal conductivity of $1.15$ $W/m.K$. If the inner surface is at $1100^{\circ} C$ and the outer surface is at $350^{\circ} C$, then the design thickness (in meter) of the wall to maintain a steady heat flux of $2500$ $W/m^2$ should be _______
A plane wall has a thermal conductivity of $1.15$ $W/m.K$. If the inner surface is at $1100^{\circ} C$ and the outer surface is at $350^{\circ} C$, then the design thickn...
Arjun
28.5k
points
Arjun
asked
Feb 19, 2017
Heat Transfer
gateme-2014-set4
numerical-answers
fluid-mechanics-and-thermal-science
heat-transfer
heat-exchanger
+
–
0
answers
0
votes
GATE2020-ME-2: 17
For an air-standard Diesel cycle, heat addition is at constant volume and heat rejection is at constant pressure heat addition is at constant pressure and heat rejection is at constant pressure heat addition is at constant pressure and heat rejection is at constant volume heat addition is at constant volume and heat rejection is at constant volume
For an air-standard Diesel cycle,heat addition is at constant volume and heat rejection is at constant pressureheat addition is at constant pressure and heat rejection is...
go_editor
5.0k
points
go_editor
asked
Sep 18, 2020
Applications
gateme-2020-set2
diesel-and-dual-cycles
applications
fluid-mechanics-and-thermal-science
+
–
0
answers
0
votes
GATE2018-1-23
An ideal gas undergoes a process from state $1 \: (T_1 = 300\: K, \: p_1 = 100 \: kPa)$ to state $2 \: (T_2 = 600 \; K, \: p_2 = 500 \: kPa)$. The specific heats of the ideal gas are: $C_p = 1 \: kJ/kg-K$ and $C_v = 0.7 \: kJ/kg-K$. The change in specific entropy of the ideal gas from state $1$ to state $2$ (in $kJ/kg-K$) is ______ (correct to two decimal places).
An ideal gas undergoes a process from state $1 \: (T_1 = 300\: K, \: p_1 = 100 \: kPa)$ to state $2 \: (T_2 = 600 \; K, \: p_2 = 500 \: kPa)$. The specific heats of the...
Arjun
28.5k
points
Arjun
asked
Feb 17, 2018
Applications
gateme-2018-set1
numerical-answers
fluid-mechanics-and-thermal-science
applications
vapour-and-gas-power-cycles
+
–
0
answers
0
votes
GATE2018-1-10
Which one of the following statements is correct for a superheated vapour? Its pressure is less than the saturation pressure at a given temperature Its temperature is less than the saturation temperature at a given pressure Its volume is less than the ... the saturated vapour at a given temperature Its enthalpy is less than the enthalpy of the saturated vapour at a given pressure
Which one of the following statements is correct for a superheated vapour?Its pressure is less than the saturation pressure at a given temperatureIts temperature is less ...
Arjun
28.5k
points
Arjun
asked
Feb 17, 2018
Heat Transfer
gateme-2018-set1
heat-transfer
fluid-mechanics-and-thermal-science
+
–
0
answers
0
votes
GATE2020-ME-1: 25
In a concentric tube counter-flow heat exchanger, hot oil enters at $102^{\circ}C$ and leaves at $65^{\circ}C$. Cold water enters at $25^{\circ}C$ and leaves at $42^{\circ}C$. The log mean temperature difference $(LMTD)$ is ________ $^{\circ}C$ (round off to one decimal place).
In a concentric tube counter-flow heat exchanger, hot oil enters at $102^{\circ}C$ and leaves at $65^{\circ}C$. Cold water enters at $25^{\circ}C$ and leaves at $42^{\cir...
go_editor
5.0k
points
go_editor
asked
Feb 19, 2020
Heat Transfer
gateme-2020-set1
numerical-answers
fluid-mechanics-and-thermal-science
heat-transfer
heat-exchanger
+
–
0
answers
1
votes
GATE ME 2012 | Question: 53
Air enters an adiabatic nozzle at $300$ kPa, $500$ K with a velocity of $10$ m/s. It leaves the nozzle at $100$ kPa with a velocity of $180$ m/s. The inlet area is $80 \: cm^2$. The specific heat of air $C_p$ is $1008$ J/kg.K. The exit area of the nozzle in $cm^4$ is $90.1$ $56.3$ $4.4$ $12.9$
Air enters an adiabatic nozzle at $300$ kPa, $500$ K with a velocity of $10$ m/s. It leaves the nozzle at $100$ kPa with a velocity of $180$ m/s. The inlet area is $80 \...
Andrijana3306
1.5k
points
Andrijana3306
asked
Mar 19, 2018
Heat Transfer
gateme-2012
fluid-mechanics-and-thermal-science
heat-transfer
+
–
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