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Recent questions and answers in Thermodynamics
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GATE2019 ME2: 12
For a simple compressible system, $v, s, p$ and $T$ are specific volume, specific entropy, pressure and temperature, respectively. As per Maxwell's relations, $\big( \frac{\partial v}{\partial s} \big) _p$ $\big( \frac{\partial s}{\partial T} \big) _p$ ... $  \big( \frac{\partial T}{\partial v} \big) _p$ $\big( \frac{\partial T}{\partial p} \big) _s$
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Feb 9, 2019
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gate2019me2
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GATE2019 ME2: 13
Which one of the following modifications of the simple ideal Rankine cycle increases the thermal efficiency and reduces the moisture content of the steam at the turbine outlet? Increasing the boiler pressure Decreasing the boiler pressure Increasing the turbine inlet temperature decreasing the condenser pressure
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Feb 9, 2019
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Thermodynamics
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Arjun
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21.2k
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gate2019me2
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GATE2018243
A standard vapor compression refrigeration cycle operating with a condensing temperature of $35^{\circ}C$ and an evaporating temperature of $10^{\circ}C$ develops $15 \: kW$ of cooling. The $ph$ diagram shows the enthalpies at various states. If the isentropic ... of the compressor is $0.75$, the magnitude of compressor power (in $kW$) is _________ (correct to two decimal places)
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Feb 17, 2018
in
Thermodynamics
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Arjun
(
21.2k
points)
gate2018me2
numericalanswers
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GATE2018244
Ambient air is at a pressure of $100 \: kPa$, dry bulb temperature at $30^{\circ} C$ and $60 \%$ relative humidity. The saturation pressure of water at $30^{\circ} C$ id $4.24 \: kPa$. The specific humidity of air (in $g/kg$ of dry air) is _______ (correct to two decimal places).
asked
Feb 17, 2018
in
Thermodynamics
by
Arjun
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21.2k
points)
gate2018me2
numericalanswers
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GATE2018210
For an ideal gas with constant properties undergoing a quasistatic process, which one of the following represents the change of entropy $(\Delta s$) from state $1$ to $2$? $\Delta s = C_p \text{ln} \bigg( \frac{T_2}{T_1} \bigg)  R\text{ln} \bigg( \frac{P_2}{P_1} \bigg)$ ... $\Delta s = C_V \text{ln} \bigg( \frac{T_2}{T_1} \bigg) + R\text{ln} \bigg( \frac{V_1}{V_2} \bigg)$
asked
Feb 17, 2018
in
Thermodynamics
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Arjun
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21.2k
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gate2018me2
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GATE2018144
A tank of volume $0.05 \: m^3$ contains a mixture of saturated water and saturated steam at $200 ^{\circ}C$. The mass of the liquid present is $8 \: kg$. The entropy (in $kJ/kg \: K$) of the mixture is _______ (correct to two decimal places). Property data for saturated steam and water are: ... $s_{fg}=4.1014 \: kJ/kg \: K, \: s_f=2.3309 \: kJ/kg \: K$
asked
Feb 17, 2018
in
Thermodynamics
by
Arjun
(
21.2k
points)
gate2018me1
numericalanswers
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