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Most viewed questions in Fluid Mechanics and Thermal Sciences
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GATE2018-2-22
The viscous laminar flow of air over a flat plate results in the formation of a boundary layer. The boundary layer thickness at the end of the plate of length $L$ is $\delta_L$. When the plate length is increased to twice its original length, the ... laminar boundary layer thickness at the end of the plate (with respect to $\delta_L$ is _______ (correct to two decimal palces).
The viscous laminar flow of air over a flat plate results in the formation of a boundary layer. The boundary layer thickness at the end of the plate of length $L$ is $\de...
Arjun
28.7k
points
Arjun
asked
Feb 17, 2018
Fluid Mechanics
gateme-2018-set2
numerical-answers
+
–
0
answers
0
votes
GATE2017 ME-1: 9
Which one of the following is NOT a rotating machine? Centrifugal pump Gear pump Jet pump Vane pump
Which one of the following is NOT a rotating machine?Centrifugal pumpGear pumpJet pumpVane pump
Arjun
28.7k
points
Arjun
asked
Feb 26, 2017
Fluid Mechanics
gateme-2017-set1
fluid-mechanics-and-thermal-science
fluid-mechanics
+
–
0
answers
0
votes
GATE2016-3-39
Consider a fully developed steady laminar flow of an incompressible fluid with viscosity $μ$ through a circular pipe of radius $R$. Given that the velocity at a radial location of $R/2$ from the centerline of the pipe is $U_1$, the shear stress at the wall is $KμU_1$/$R$, where $K$ is __________
Consider a fully developed steady laminar flow of an incompressible fluid with viscosity $μ$ through a circular pipe of radius $R$. Given that the velocity at a radial l...
Arjun
28.7k
points
Arjun
asked
Feb 24, 2017
Fluid Mechanics
gateme-2016-set3
numerical-answers
fluid-mechanics-and-thermal-science
fluid-mechanics
flow-through-pipes
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–
0
answers
0
votes
GATE Mechanical 2014 Set 4 | Question: 13
A reversed Carnot cycle refrigerator maintains a temperature of −$5^{\circ}$ $C$. The ambient air temperature is $35^{\circ}$ $C$. The heat gained by the refrigerator at a continuous rate is $2.5$ kJ/s. The power (in watt) required to pump this heat out continuously is _______
A reversed Carnot cycle refrigerator maintains a temperature of −$5^{\circ}$ $C$. The ambient air temperature is $35^{\circ}$ $C$. The heat gained by the refrigerator a...
Arjun
28.7k
points
Arjun
asked
Feb 19, 2017
Applications
gateme-2014-set4
numerical-answers
fluid-mechanics-and-thermal-science
applications
refrigeration-and-air-conditioning
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–
0
answers
0
votes
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
asked
Feb 19, 2017
Heat Transfer
gateme-2013
fluid-mechanics-and-thermal-science
heat-transfer
heat-conduction
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–
0
answers
0
votes
ISRO2009-1
A hydraulic press has a ram of $15 \: \text{cm}$ diameter and plunger of $1.5 \: \text{cm}$. It is required to lift a mass of $1000 \: \text{kg}$. The force required on plunger is nearly equal to $100\;\text{N}$ $1000\;\text{N}$ $10000\;\text{N}$ $10\;\text{N}$
A hydraulic press has a ram of $15 \: \text{cm}$ diameter and plunger of $1.5 \: \text{cm}$. It is required to lift a mass of $1000 \: \text{kg}$. The force required on p...
m2n037
940
points
m2n037
asked
Mar 6, 2018
Fluid Mechanics
isro2009
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–
0
answers
0
votes
GATE2017 ME-2: 14
A mass $m$ of a perfect gas at pressure $p_{1}$ and volume $V_{1}$ undergoes an isothermal process. The final pressure is $p_{2}$ and volume is $V_{2}$. The work done on the system is considered positive. If $R$ is the gas constant and $T$ is the temperature, then the work done in the ... $RT \ln \dfrac{V_{2}}{V_{1}} \\$ $-mRT \ln \dfrac{P_{2}}{P_{1}}$
A mass $m$ of a perfect gas at pressure $p_{1}$ and volume $V_{1}$ undergoes an isothermal process. The final pressure is $p_{2}$ and volume is $V_{2}$. The work done on ...
Arjun
28.7k
points
Arjun
asked
Feb 26, 2017
Thermodynamics
gateme-2017-set2
fluid-mechanics-and-thermal-science
thermodynamics
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–
0
answers
0
votes
GATE2017 ME-1: 11
The molar specific heat at constant volume of an ideal gas is equal to $2.5$ times the universal gas constant ($8.314$ J/mol.K). When the temperature increases by $100$K, the change in molar specific enthalpy is __________ J/mol.
The molar specific heat at constant volume of an ideal gas is equal to $2.5$ times the universal gas constant ($8.314$ J/mol.K). When the temperature increases by $100$K,...
Arjun
28.7k
points
Arjun
asked
Feb 26, 2017
Heat Transfer
gateme-2017-set1
numerical-answers
fluid-mechanics-and-thermal-science
heat-transfer
+
–
0
answers
0
votes
GATE Mechanical 2014 Set 4 | Question: 41
A closed system contains $10$ $kg$ of saturated liquid ammonia at $10^{\circ}$ $C$. Heat addition required to convert the entire liquid into saturated vapour at a constant pressure is $16.2$ $MJ$. If the entropy of the saturated liquid is $0.88$ $kJ/kg.K$, the entropy (in $kJ/kg.K$) of saturated vapour is _______
A closed system contains $10$ $kg$ of saturated liquid ammonia at $10^{\circ}$ $C$. Heat addition required to convert the entire liquid into saturated vapour at a constan...
Arjun
28.7k
points
Arjun
asked
Feb 19, 2017
Fluid Mechanics
gateme-2014-set4
numerical-answers
fluid-mechanics-and-thermal-science
fluid-mechanics
+
–
0
answers
0
votes
GATE Mechanical 2014 Set 4 | Question: 16
Kaplan water turbine is commonly used when the flow through its runner is axial and the head available is more than $100$ $m$ axial and the head available is less than $10$ $m$ radial and the head available is more than $100$ $m$ mixed and the head available is about $50$ $m$
Kaplan water turbine is commonly used when the flow through its runner isaxial and the head available is more than $100$ $m$axial and the head available is less than $10$...
Arjun
28.7k
points
Arjun
asked
Feb 19, 2017
Applications
gateme-2014-set4
fluid-mechanics-and-thermal-science
applications
kaplan-turbines
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–
0
answers
0
votes
GATE ME 2013 | Question: 55
In a simple Brayton cycle, the pressure ratio is $8$ and temperatures at the entrance of compressor and turbine are $300$ $K$ and $1400$ $K$, respectively. Both compressor and gas turbine have isentropic efficiencies equal to $0.8$. For the gas, assume a ... and potential energies. The thermal efficiency of the cycle in percentage (%) is $24.8$ $38.6$ $44.8$ $53.1$
In a simple Brayton cycle, the pressure ratio is $8$ and temperatures at the entrance of compressor and turbine are $300$ $K$ and $1400$ $K$, respectively. Both compresso...
piyag476
1.4k
points
piyag476
asked
Feb 19, 2017
Applications
gateme-2013
fluid-mechanics-and-thermal-science
applications
vapour-and-gas-power-cycles
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–
0
answers
0
votes
ISRO2009-9
The radiative heat transfer rate per unit area $(W/m2)$ between two plane parallel grey surfaces (emissivity $0.9$) maintained at $400 \: \text{K}$ and $300 \: \text{K}$ is (Stefan Bottzman constant $\sigma=5.67 \times 10^{-6} \;W/m^2K^4)$ $1020$ $464$ $812$ $567$
The radiative heat transfer rate per unit area $(W/m2)$ between two plane parallel grey surfaces (emissivity $0.9$) maintained at $400 \: \text{K}$ and $300 \: \text{K}$ ...
m2n037
940
points
m2n037
asked
Mar 6, 2018
Heat Transfer
isro2009
+
–
0
answers
0
votes
GATE Mechanical 2014 Set 3 | Question: 50
Consider the given project network, where numbers along various activities represent the normal time. The free float on activity $4$-$6$ and the project duration, respectively, are $2$, $13$ $0$, $13$ $-2$, $13$ $2$, $12$
Consider the given project network, where numbers along various activities represent the normal time. The free float on activity $4$-$6$ and the project duration, respect...
Arjun
28.7k
points
Arjun
asked
Feb 19, 2017
Fluid Mechanics
gateme-2014-set3
fluid-mechincs
stability-of-floating-bodies
fluid-mechanics-and-thermal-science
+
–
0
answers
0
votes
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...
go_editor
5.0k
points
go_editor
asked
Feb 19, 2020
Fluid Mechanics
gateme-2020-set1
fluid-mechanics-and-thermal-science
fluid-mechanics
+
–
0
answers
0
votes
GATE2017 ME-2: 16
For the stability of a floating body the Centre of buoyancy must coincide with the centre of gravity. Centre of buoyancy must be above the centre of gravity. Centre of gravity must be above the centre of buoyancy. Metacentre must be above the centre of gravity.
For the stability of a floating body theCentre of buoyancy must coincide with the centre of gravity.Centre of buoyancy must be above the centre of gravity.Centre of gravi...
Arjun
28.7k
points
Arjun
asked
Feb 26, 2017
Fluid Mechanics
gateme-2017-set2
fluid-mechanics-and-thermal-science
fluid-mechanics
buoyancy
+
–
0
answers
0
votes
GATE2017 ME-1: 10
Saturated steam at $100^{\circ} C$ condenses on the outside of a tube. Cold fluid enters the tube at $20^{\circ} C$ and exits at $50^{\circ} C$. The value of the Log mean Temperature Difference (LMTD) is ________ $^{\circ}$ C.
Saturated steam at $100^{\circ} C$ condenses on the outside of a tube. Cold fluid enters the tube at $20^{\circ} C$ and exits at $50^{\circ} C$. The value of the Log mean...
Arjun
28.7k
points
Arjun
asked
Feb 26, 2017
Heat Transfer
gateme-2017-set1
numerical-answers
fluid-mechanics-and-thermal-science
heat-transfer
+
–
0
answers
0
votes
GATE2016-1-45
For water at $25^\circ C$, $dp_s/dT_s = 0.189 \: kPa/K$ ($p_s$ is the saturation pressure in $kPa$ and $T_s$ is the saturation temperature in $K$) and the specific volume of dry saturated vapour is $43.38 \: m^3/kg$. Assume that the ... vapour. Using the Clausius-Clapeyron equation, an estimate of the enthalpy of evaporation of water at $25^\circ C$ (in $kJ / kg$) is __________
For water at $25^\circ C$, $dp_s/dT_s = 0.189 \: kPa/K$ ($p_s$ is the saturation pressure in $kPa$ and $T_s$ is the saturation temperature in $K$) and the specific volum...
Arjun
28.7k
points
Arjun
asked
Feb 24, 2017
Heat Transfer
gateme-2016-set1
numerical-answers
fluid-mechanics-and-thermal-science
heat-transfer
+
–
0
answers
0
votes
GATE2016-1-43
An infinitely long furnace of $0.5\:m\times 0. 4 \:m$ cross-section is shown in the figure below. Consider all surfaces of the furnace to be black. The top and bottom walls are maintained at temperature $T_1=T_3=927^\circ C$ ... loss or gain on side $1$ is_________ $W/m$. Stefan-Boltzmann constant = $5.67 \times 10^{-8}$ $W/m^2-K^4$
An infinitely long furnace of $0.5\:m\times 0. 4 \:m$ cross-section is shown in the figure below. Consider all surfaces of the furnace to be black. The top and bottom wal...
Arjun
28.7k
points
Arjun
asked
Feb 24, 2017
Heat Transfer
gateme-2016-set1
numerical-answers
fluid-mechanics-and-thermal-science
heat-transfer
heat-transfer-correlations-for-flow-over-flat-plates-and-through-pipes
+
–
0
answers
0
votes
GATE2015-2-54
A project consists of $7$ activities. The network along with the time durations (in days) for various activities is shown in the figure. The minimum time (in days) for completion of the project is_________
A project consists of $7$ activities. The network along with the time durations (in days) for various activities is shown in the figure.The minimum time (in days) for com...
Arjun
28.7k
points
Arjun
asked
Feb 24, 2017
Heat Transfer
gateme-2015-set2
numerical-answers
radiation-network-analysis
heat-transfer
fluid-mechanics-and-thermal-science
+
–
0
answers
0
votes
GATE2015-1-50
A $10$ $mm$ diameter electrical conductor is covered by an insulation of $2\:mm$ thickness. The conductivity of the insulation is $0.08$ $W/m-K$ and the convection coefficient at the insulation surface is $10$ $W/m^2-K$. Addition of ... heat loss continuously increase heat loss to a maximum and then decrease heat loss decrease heat loss to a minimum and then increase heat loss
A $10$ $mm$ diameter electrical conductor is covered by an insulation of $2\:mm$ thickness. The conductivity of the insulation is $0.08$ $W/m-K$ and the convection coeffi...
Arjun
28.7k
points
Arjun
asked
Feb 24, 2017
Heat Transfer
gateme-2015-set1
fluid-mechanics-and-thermal-science
heat-transfer
+
–
0
answers
0
votes
GATE Mechanical 2014 Set 4 | Question: 14
A flow field which has only convective acceleration is a steady uniform flow an unsteady uniform flow a steady non-uniform flow an unsteady non-uniform flow
A flow field which has only convective acceleration isa steady uniform flowan unsteady uniform flowa steady non-uniform flowan unsteady non-uniform flow
Arjun
28.7k
points
Arjun
asked
Feb 19, 2017
Fluid Mechanics
gateme-2014-set4
fluid-mechanics
fluid-mechanics-and-thermal-science
+
–
0
answers
0
votes
GATE Mechanical 2014 Set 1 | Question: 9
A circular object of radius $r$ rolls without slipping o n a horizontal level floor with the center having Velocity $V$. The velocity at the point of contact between the object and the floor is zero $V$ in the direction of motion $V$ opposite to the direction of motion $V$ vertically upward from the floor
A circular object of radius $r$ rolls without slipping o n a horizontal level floor with the center having Velocity $V$. The velocity at the point of contact between the ...
Arjun
28.7k
points
Arjun
asked
Feb 19, 2017
Applications
gateme-2014-set1
applications
fluid-mechanics-and-thermal-science
+
–
0
answers
0
votes
GATE2016-2-44
A piston-cylinder device initially contains $0.4 \: m^3$ of air (to be treated as an ideal gas) at $100 \: kPa$ and $80^ \circ C$. The air is now isothermally compressed to $0.1 \: m^3$. The work done during this process is ________ $kJ$.
A piston-cylinder device initially contains $0.4 \: m^3$ of air (to be treated as an ideal gas) at $100 \: kPa$ and $80^ \circ C$. The air is now isothermally compressed ...
Arjun
28.7k
points
Arjun
asked
Feb 24, 2017
Fluid Mechanics
gateme-2016-set2
numerical-answers
fluid-mechanics
ic-engines
+
–
0
answers
0
votes
GATE Mechanical 2014 Set 2 | Question: 15
A pure substance at $8$ $MPa$ and $400^0C$ is having a specific internal energy of $2864$ $kJ/kg$ and a specific volume of $0.03432$ $m^3$/$kg$. Its specific enthalpy (in $kJ/kg$) is _______
A pure substance at $8$ $MPa$ and $400^0C$ is having a specific internal energy of $2864$ $kJ/kg$ and a specific volume of $0.03432$ $m^3$/$kg$. Its specific enthalpy (in...
Arjun
28.7k
points
Arjun
asked
Feb 19, 2017
Thermodynamics
gateme-2014-set2
numerical-answers
properties-of-pure-substances
thermodynamics
fluid-mechanics-and-thermal-science
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–
0
answers
0
votes
GATE ME 2013 | Question: 44
The pressure, temperature and velocity of air flowing in a pipe are $5$ $bar$, $500$ $K$ and $50$ $m$/$s$, respectively. The specific heats of air at constant pressure and at constant volume are $1.005$ $kJ$/$kgK$ and $0.718$ $kJ$/$kgK$, respectively. ... $bar$ and $300$ $K$, respectively, the available energy in $kJ$/$kg$ of the air stream is $170$ $187$ $191$ $213$
The pressure, temperature and velocity of air flowing in a pipe are $5$ $bar$, $500$ $K$ and $50$ $m$/$s$, respectively. The specific heats of air at constant pressure an...
piyag476
1.4k
points
piyag476
asked
Feb 19, 2017
Heat Transfer
gateme-2013
fluid-mechanics-and-thermal-science
heat-transfer
+
–
0
answers
0
votes
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
go_editor
5.0k
points
go_editor
asked
Feb 19, 2020
Fluid Mechanics
gateme-2020-set1
fluid-mechanics-and-thermal-science
fluid-mechanics
buoyancy
+
–
0
answers
0
votes
GATE2017 ME-1: 32
For a steady flow, the velocity field is $\vec{V}=(-x^{2}+3y)\hat{i}+(2xy)\hat{j}$. The magnitude of the acceleration of a particle at $(1, -1)$ is $2$ $1$ $2\sqrt{5}$ $0$
For a steady flow, the velocity field is $\vec{V}=(-x^{2}+3y)\hat{i}+(2xy)\hat{j}$. The magnitude of the acceleration of a particle at $(1, -1)$ is$2$$1$$2\sqrt{5}$$0$
Arjun
28.7k
points
Arjun
asked
Feb 26, 2017
Fluid Mechanics
gateme-2017-set1
fluid-mechanics-and-thermal-science
fluid-mechanics
+
–
0
answers
0
votes
GATE2015-2-46
For the same values of peak pressure, peak temperature and heat rejection, the correct order of efficiencies for Otto, Dual and Diesel cycles is $\eta _{\text{Otto}}> \eta _{\text{Dual}}> \eta _{\text{Diesel}}$ ... $\eta _{\text{Diesel}}> \eta _{\text{Otto}}> \eta _{\text{Dual}}$
For the same values of peak pressure, peak temperature and heat rejection, the correct order of efficiencies for Otto, Dual and Diesel cycles is$\eta _{\text{Otto}} \eta ...
Arjun
28.7k
points
Arjun
asked
Feb 24, 2017
Heat Transfer
gateme-2015-set2
heat-transfer
fluid-mechanics-and-thermal-science
+
–
0
answers
0
votes
GATE2018-2-10
For an ideal gas with constant properties undergoing a quasi-static process, which one of the following represents the change of entropy $(\Delta s$) from state $1$ to $2$? $\Delta s = C_p \ln \bigg( \dfrac{T_2}{T_1} \bigg) - R \ln \bigg( \dfrac{P_2}{P_1} \bigg) \\$ ... $\Delta s = C_V \ln \bigg( \dfrac{T_2}{T_1} \bigg) + R \ln \bigg( \dfrac{V_1}{V_2} \bigg)$
For an ideal gas with constant properties undergoing a quasi-static process, which one of the following represents the change of entropy $(\Delta s$) from state $1$ to $2...
Arjun
28.7k
points
Arjun
asked
Feb 17, 2018
Thermodynamics
gateme-2018-set2
+
–
0
answers
0
votes
GATE2016-2-15
A hollow cylinder has length $L$, inner radius $r_1$, outer radius $r_2$, and thermal conductivity $k$. The thermal resistance of the cylinder for radial conduction is $\dfrac{\ln(r_2/r_1)}{2\pi kL} \\$ $\dfrac{\ln(r_1/r_2)}{2\pi kL} \\$ $\dfrac{2\pi kL}{\ln(r_2/r_1)} \\$ $\dfrac{2\pi kL}{\ln(r_1/r_2)}$
A hollow cylinder has length $L$, inner radius $r_1$, outer radius $r_2$, and thermal conductivity $k$. The thermal resistance of the cylinder for radial conduction is$\d...
Arjun
28.7k
points
Arjun
asked
Feb 24, 2017
Fluid Mechanics
gateme-2016-set2
fluid-mechanics-and-thermal-science
fluid-mechanics
+
–
0
answers
0
votes
GATE Mechanical 2014 Set 1 | Question: 44
For a fully developed flow of water in a pipe having diameter $10$ $cm$, velocity $0.1$ $m/s$ and kinematic viscosity $10^{−5}$ $m^2$/$s$, the value of Darcy friction factor is _______
For a fully developed flow of water in a pipe having diameter $10$ $cm$, velocity $0.1$ $m/s$ and kinematic viscosity $10^{−5}$ $m^2$/$s$, the value of Darcy friction f...
Arjun
28.7k
points
Arjun
asked
Feb 19, 2017
Fluid Mechanics
gateme-2014-set1
numerical-answers
fluid-mechanics-and-thermal-science
fluid-mechanics
flow-through-pipes
+
–
0
answers
0
votes
GATE2017 ME-2: 19
The emissive power of a blackbody is $P$. If its absolute temperature is doubled, the emissive power becomes $2 P$ $4 P$ $8 P$ $16 P$
The emissive power of a blackbody is $P$. If its absolute temperature is doubled, the emissive power becomes$2 P$$4 P$$8 P$$16 P$
Arjun
28.7k
points
Arjun
asked
Feb 26, 2017
Heat Transfer
gateme-2017-set2
numerical-answers
black-and-grey-surfaces
heat-transfer
fluid-mechanics-and-thermal-science
+
–
0
answers
0
votes
GATE2015-2-41
For a fully developed laminar flow of water (dynamic viscosity $0.001$ $P_{a-s}$) through a pipe of radius $5$ $cm$, the axial pressure gradient is −$10$ $Pa/m$. The magnitude of axial velocity (in $m/s$) at a radial location of $0.2$ $cm$ is _______
For a fully developed laminar flow of water (dynamic viscosity $0.001$ $P_{a-s}$) through a pipe of radius $5$ $cm$, the axial pressure gradient is −$10$ $Pa/m$. The ma...
Arjun
28.7k
points
Arjun
asked
Feb 24, 2017
Fluid Mechanics
gateme-2015-set2
numerical-answers
fluid-mechanics
fluid-mechanics-and-thermal-science
+
–
0
answers
0
votes
GATE Mechanical 2014 Set 2 | Question: 43
Water flows through a $10$ $mm$ diameter and $250$ $m$ long smooth pipe at an average velocity of $0.1 m/s$. The density and the viscosity of water are $997$ $kg/m^3$ and $855×10^−6$ $N.s/m^2$, respectively. Assuming fully-developed flow, the pressure drop (in $Pa$) in the pipe is _______
Water flows through a $10$ $mm$ diameter and $250$ $m$ long smooth pipe at an average velocity of $0.1 m/s$. The density and the viscosity of water are $997$ $kg/m^3$ and...
Arjun
28.7k
points
Arjun
asked
Feb 19, 2017
Fluid Mechanics
gateme-2014-set2
numerical-answers
fluid-mechanics-and-thermal-science
fluid-mechanics
flow-through-pipes
+
–
0
answers
0
votes
GATE Mechanical 2014 Set 2 | Question: 48
In a concentric counter flow heat exchanger, water flows through the inner tube at $25^\circ C$ and leaves at $42^\circ C$. The engine oil enters at $100^\circ C$ and flows in the annular flow passage. The exit temperature of the engine ... water and oil are $4178 J/kg.K$ and $2130 J/kg.K$, respectively. The effectiveness of this heat exchanger is _______
In a concentric counter flow heat exchanger, water flows through the inner tube at $25^\circ C$ and leaves at $42^\circ C$. The engine oil enters at $100^\circ C$ and flo...
Arjun
28.7k
points
Arjun
asked
Feb 19, 2017
Heat Transfer
gateme-2014-set2
numerical-answers
fluid-mechanics-and-thermal-science
heat-transfer
heat-exchanger-performance
+
–
0
answers
0
votes
GATE ME 2012 | Question: 17
The velocity triangles at the inlet and exit of the rotor of a turbomachine are shown. $V$ denotes the absolute velocity of the fluid, $W$ denotes the relative velocity of the fluid and $U$ denotes the blade velocity. Subscripts $1$ and $2$ refer to inlet and outlet respectively. If $V_2 =W_1$ and $V_1=W_2$, then the degree of reaction is $0$ $1$ $0.5$ $0.25$
The velocity triangles at the inlet and exit of the rotor of a turbomachine are shown. $V$ denotes the absolute velocity of the fluid, $W$ denotes the relative velocity o...
Andrijana3306
1.5k
points
Andrijana3306
asked
Mar 19, 2018
Fluid Mechanics
gateme-2012
fluid-mechanics-and-thermal-science
fluid-mechanics
+
–
0
answers
0
votes
ISRO2009-4
The relation ${p^{V}}^{\gamma}=$ constant, where $\gamma$ is the ratio of the specific heats of ideal gas, is applicable to Any adiabatic process Only reversible adiabatic process Only irreversible adiabatic process Only isothermal process
The relation ${p^{V}}^{\gamma}=$ constant, where $\gamma$ is the ratio of the specific heats of ideal gas, is applicable toAny adiabatic processOnly reversible adiabatic ...
m2n037
940
points
m2n037
asked
Mar 6, 2018
Heat Transfer
isro2009
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–
0
answers
0
votes
GATE2017 ME-1: 33
One kg of an ideal gas (gas constant, $R= 400 J/kg.K$; specific heat at constant volume, $c_{v}=1000 J/kg.K$) at $1$ bar, and $300$ K is contained in a sealed rigid cylinder. During an adiabatic process, $100$ kJ of work is done on the system by a stirrer. The increase in entropy of the system is _______ $J/K$.
One kg of an ideal gas (gas constant, $R= 400 J/kg.K$; specific heat at constant volume, $c_{v}=1000 J/kg.K$) at $1$ bar, and $300$ K is contained in a sealed rigid cylin...
Arjun
28.7k
points
Arjun
asked
Feb 26, 2017
Applications
gateme-2017-set1
numerical-answers
applications
fluid-mechanics-and-thermal-science
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–
0
answers
0
votes
GATE Mechanical 2014 Set 1 | Question: 16
In a power plant, water (density = $1000$ $kg$/$m^3$) is pumped from $80$ $kPa$ to $3$ $MPa$. The pump has an isentropic efficiency of $0.85$. Assuming that the temperature of the water remains the same, the specific work (in $kJ$/$kg$) supplied to the pump is $0.34$ $2.48$ $2.92$ $3.43$
In a power plant, water (density = $1000$ $kg$/$m^3$) is pumped from $80$ $kPa$ to $3$ $MPa$. The pump has an isentropic efficiency of $0.85$. Assuming that the temperatu...
Arjun
28.7k
points
Arjun
asked
Feb 19, 2017
Fluid Mechanics
gateme-2014-set1
fluid-mechanics-and-thermal-science
fluid-mechanics
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–
0
answers
0
votes
GATE ME 2013 | Question: 50
Water (specific heat, $c_p$ = $4.18$ $kJ$/$kgK$) enters a pipe at a rate of $0.01 kg/s$ and a temperature of $20^ \circ C$.The pipe, of diameter $50$ $mm$ and length $3$ $m$, is subjected to a wall heat flux ${q_{w}}''$ in $W$ ... ($x = 0$ at the inlet), the bulk mean temperature of the water leaving the pipe in $^\circ \textrm{C}$ is $42$ $62$ $74$ $104$
Water (specific heat, $c_p$ = $4.18$ $kJ$/$kgK$) enters a pipe at a rate of $0.01 kg/s$ and a temperature of $20^ \circ C$.The pipe, of diameter $50$ $mm$ and length $3$ ...
piyag476
1.4k
points
piyag476
asked
Feb 19, 2017
Heat Transfer
gateme-2013
fluid-mechanics-and-thermal-science
heat-transfer
heat-transfer-correlations-for-flow-over-flat-plates-and-through-pipes
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