1
GATE ME 2010
MCQ (Single Correct Answer)
+2
-0.6
A mono-atomatic ideal gas $$\left( {\gamma = 1.67,} \right.$$ molecular weight$$=40$$ $$\left. \, \right)$$ is compressed adiabatically from $$0.1$$ $$MPa,$$ $$300K$$ to $$0.2$$ $$MPa.$$ The universal gas constant is $$8.314$$ $$kJ$$ $$kmo{l^{ - 1}}{K^{ - 1}}.$$ The work of compression of the gas (in $$kJ$$ $$k{g^{ - 1}}$$) is
A
$$29.7$$
B
$$19.9$$
C
$$13.3$$
D
$$0$$
2
GATE ME 2010
MCQ (Single Correct Answer)
+1
-0.3
One kilogram of water at room temperature is brought into contact with a high temperature thermal reservoir. The entropy change of the universe is
A
equal to entropy change of the reservoir
B
equal to entropy change of water
C
equal to zero
D
always positive
3
GATE ME 2010
MCQ (Single Correct Answer)
+2
-0.6
Consider the following two processes;
$$\left( {\rm I} \right)$$ A heat source at $$1200$$ $$K$$ loses $$2500$$ $$kJ$$ of heat to a sink at $$800$$ $$K$$
$$\left( {\rm II} \right)$$ A heat source at $$800$$ $$K$$ loses $$2000$$ $$kJ$$ of heat to a sink at $$500$$ $$K$$

Which of the following statements is true?

A
Process $${\rm I}$$ is more irreversible than process $${\rm II}$$
B
Process $${\rm II}$$ is more irreversible than process $${\rm I}$$
C
Irreversibility associated in both the processes are equal
D
Both the processes are reversible
4
GATE ME 2010
MCQ (Single Correct Answer)
+2
-0.6
In a steam power plant operating on the Rankine cycle, steam enters the turbine at $$4$$ $$MPa,$$ $${350^ \circ }C$$ and exits at a pressure of $$15$$ $$kPa.$$ Then it enters the condenser and exits as saturated water. Next, a pump feeds back the water to the boiler. The adiabatic efficiency of the turbine is $$90\% $$. The thermodynamic states of water and steam are given in the table. GATE ME 2010 Thermodynamics - Rankine Cycle Question 22 English

$$h$$ is specific enthalpy, $$s$$ is specific entropy and $$v$$ the specific volume; subscripts $$f$$ and $$g$$ denote saturated liquid state and saturated vapour state.

The net work output $$(kJ/kg)$$ of the cycle is

A
$$498$$
B
$$775$$
C
$$860$$
D
$$957$$
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