Most viewed questions in Fluid Mechanics and Thermal Sciences / GO Mechanical

0 answers

0 votes

GATE2015-3-23
A rigid container of volume $0.5 m^3$ contains $1.0$ kg of water at $12^\circ C$ $(v_f = 0.00106 m^3/kg$, $v_g= 0.8908 m^3/kg)$. The state of water is compressed liquid saturated liquid a mixture of saturated liquid and saturated vapor superheated vapor

A rigid container of volume $0.5 m^3$ contains $1.0$ kg of water at $12^\circ C$ $(v_f = 0.00106 m^3/kg$, $v_g= 0.8908 m^3/kg)$. The state of water iscompressed liquidsat...

Arjun

28.5k points

Arjun asked Feb 24, 2017

0 answers

0 votes

GATE2015-2-45
One kg of air ($R=287 \: J/kg – K$) undergoes an irreversible process between equilibrium state $1(20^{\circ}C$, $0.9 \: m^3$) and equilibrium state $2 ( 20^{\circ} C$, $0.6\: m^3$). The change in entropy $s_2 – s_1$ (in $J/kg – K$) is _______

One kg of air ($R=287 \: J/kg – K$) undergoes an irreversible process between equilibrium state $1(20^{\circ}C$, $0.9 \: m^3$) and equilibrium state $2 ( 20^{\circ} C$,...

Arjun

28.5k points

Arjun asked Feb 24, 2017

0 answers

0 votes

GATE2015-2-47
In a Rankine cycle, the enthalpies at turbine entry and outlet are $3159$ $kJ/kg$ and $2187$ $kJ/kg$, respectively. If the specific pump work is $2$ $kJ/kg$, the specific steam consumption (in $kg/kW$-$h$) of the cycle based on net output is _______________

In a Rankine cycle, the enthalpies at turbine entry and outlet are $3159$ $kJ/kg$ and $2187$ $kJ/kg$, respectively. If the specific pump work is $2$ $kJ/kg$, the specific...

Arjun

28.5k points

Arjun asked Feb 24, 2017

0 answers

0 votes

GATE2015-2-17
The COP of a Carnot heat pump operating between $6^{\circ}C$ and $37^{\circ}C$ is ___________

The COP of a Carnot heat pump operating between $6^{\circ}C$ and $37^{\circ}C$ is ___________

Arjun

28.5k points

Arjun asked Feb 24, 2017

0 answers

0 votes

GATE2015-3-11
The ratio of momentum diffusivity $(ν)$ to thermal diffusivity $(\alpha)$, is called Prandtl number Nusselt number Biot number Lewis number

The ratio of momentum diffusivity $(ν)$ to thermal diffusivity $(\alpha)$, is calledPrandtl numberNusselt numberBiot numberLewis number

Arjun

28.5k points

Arjun asked Feb 24, 2017

0 answers

0 votes

GATE2015-2-16
In the laminar flow of air ($P_r$ = $0.7$) over a heated plate, if $\delta$ and $\delta _T$ denote, respectively, the hydrodynamic and thermal boundary layer thicknesses, then $\delta =\delta _T$ $\delta > \delta _T$ $\delta < \delta _T$ $\delta =0$ but $\delta _T\neq 0$

In the laminar flow of air ($P_r$ = $0.7$) over a heated plate, if $\delta$ and $\delta _T$ denote, respectively, the hydrodynamic and thermal boundary layer thicknesses,...

Arjun

28.5k points

Arjun asked Feb 24, 2017

0 answers

0 votes

GATE2015-3-22
Three parallel pipes connected at the two ends have flow-rates $Q_1$, $Q_2$ and $Q_3$ respectively, and the corresponding frictional head losses are $h_{L1}$, $h_{L2}$ and $h_{L3}$ respectively. The correct expressions for total flow rate $(Q)$ and frictional head loss across the two ends ($h_L$) ... $Q = Q_1 = Q_2 = Q_3; h_L = h_{L1} = h_{L2} = h_{L3}$

Three parallel pipes connected at the two ends have flow-rates $Q_1$, $Q_2$ and $Q_3$ respectively, and the corresponding frictional head losses are $h_{L1}$, $h_{L2}$ an...

Arjun

28.5k points

Arjun asked Feb 24, 2017

0 answers

0 votes

GATE2015-1-40
A ball of mass $0.1 \text{ kg}$, initially at rest, is dropped from height of $1$m. Ball hits the ground and bounces off the ground. Upon impact with the ground, the velocity reduces by $20 \%$. The height (in $m$) to which the ball will rise is _______

A ball of mass $0.1 \text{ kg}$, initially at rest, is dropped from height of $1$m. Ball hits the ground and bounces off the ground. Upon impact with the ground, the velo...

Arjun

28.5k points

Arjun asked Feb 24, 2017

0 answers

0 votes

transfer function for second order system
A second order real system has the following properties.The damping ratio is 0.5 and undamped natural frequency is 10rad/sec, the steady state value at zero is 1.02.the transfer function for the system is?

A second order real system has the following properties.The damping ratio is 0.5 and undamped natural frequency is 10rad/sec, the steady state value at zero is 1.02.the t...

refri_12

140 points

refri_12 asked Feb 16

0 answers

0 votes

GATE2016-2-6
A point mass having mass $M$ is moving with a velocity $V$ at an angle $\theta$ to the wall as shown in the figure. The mass undergoes a perfectly elastic collision with the smooth wall and rebounds. The total change (final minus initial) in the momentum of the mass is $-2MV \cos\theta \hat{j}$ $2MV \sin\theta \hat{j}$ $2MV \cos\theta \hat{j}$ $-2MV \sin\theta \hat{j}$

A point mass having mass $M$ is moving with a velocity $V$ at an angle $\theta$ to the wall as shown in the figure. The mass undergoes a perfectly elastic collision with ...

Arjun

28.5k points

Arjun asked Feb 24, 2017

0 answers

0 votes

GATE2016-1-20
The “Jominy test” is used to find Young’s modulus hardenability yield strength thermal conductivity

The “Jominy test” is used to findYoung’s modulushardenabilityyield strengththermal conductivity

Arjun

28.5k points

Arjun asked Feb 24, 2017

0 answers

0 votes

mole fraction and mass fraction
a mixture of carbon dioxide and water vapour is at 100kPa, 200C temperature. As the mixture is cooled at a constant pressure, water vapour begins to condense when the temperature reaches 70C , determine mole fraction and mass fraction of carbon dioxide ... -820kJ/kmol 277.778K h2 280K -528kJ/kmol the molar specific enthalpy of nitrogen at 277.778K is -592.88kJ/kmol

a mixture of carbon dioxide and water vapour is at 100kPa, 200C temperature. As the mixture is cooled at a constant pressure, water vapour begins to condense when the tem...

refri_12

140 points

refri_12 asked Feb 16