1
GATE ME 2008
MCQ (Single Correct Answer)
+2
-0.6
$$A$$ gas expands in a frictionless piston-cylinder arrangement. The expansion process is very slow, and is resisted by an ambient pressure of $$100kPa.$$ During the expansion process, the pressure of the system (gas) remains constant at $$300$$ $$kPa.$$ The change in volume of the gas is $$0.01{m^3}.$$

The maximum amount of work that could be utilized from the above process is

A
$$0$$ $$kJ$$
B
$$1$$ $$kJ$$
C
$$2$$ $$kJ$$
D
$$3$$ $$kJ$$
2
GATE ME 2004
MCQ (Single Correct Answer)
+2
-0.6
A steel billet of $$2000$$ $$kg$$ mass is to be cooled from $$1250$$ $$K$$ to $$450$$ $$K.$$ The heat released during this process is to be used as a source of energy. The ambient temperature is $$303$$ $$K$$ and specific heat of steel is $$0.5$$ $$kJ/kg K.$$ the available energy of this billet is
A
$$490.44$$ $$MJ$$
B
$$30.95$$ $$MJ$$
C
$$10.35$$ $$MJ$$
D
$$0.10$$ $$MJ$$
3
GATE ME 1995
MCQ (Single Correct Answer)
+2
-0.6
A heat reservoir at $$900$$ $$K$$ is brought into contact with the ambient at $$300$$ $$K$$ for a short time. During this period $$9000$$ $$kJ$$ of heat is lost by the heat reservoir. The total loss in availability due to this process is
A
$$18000$$ $$kJ$$
B
$$9000$$ $$kJ$$
C
$$6000$$ $$kJ$$
D
None of above
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