1
GATE ME 2003
+1
-0.3
A $$2$$ $$kW,$$ $$40$$ liter water heater is switched on for $$20$$ minutes. The heat capacity $${C_p}$$ for water is $$4.2$$ $$kJ/kg$$ $$K.$$ Assuming all the electrical energy has gone into heating the water, increase of the water temperature in degree centigrade is
A
$$2.7$$
B
$$4.0$$
C
$$14.3$$
D
$$25.25$$
2
GATE ME 2000
+1
-0.3
A steam turbine receives steam steadily at $$10$$ $$bar$$ with an enthalpy of $$3000$$ $$kJ/kg$$ and discharges at $$1$$ bar with an enthalpy of $$2700$$ $$kJ/kg.$$ The work output is $$250$$ $$kJ/kg.$$ The changes in kinetic and potential energies are negligible. The heat transfer from the turbine casing to the surroundings is equal to
A
$$0$$ $$kJ$$
B
$$50$$ $$kJ$$
C
$$150$$ $$kJ$$
D
$$250$$ $$kJ$$
3
GATE ME 1999
+1
-0.3
A steel ball of mass $$1$$ $$kg$$ and specific heat $$0.4$$ $$kJ/kg$$ is at temperature of $${60^ \circ }C.$$ It is dropped into $$1$$ $$kg$$ water at $${20^ \circ }C.$$ The final steady state temperature of water is
A
$${23.5^ \circ }C.$$
B
$${30^ \circ }C.$$
C
$${35^ \circ }C.$$
D
$${40^ \circ }C.$$
4
GATE ME 1993
+1
-0.3
The first law of thermodynamics takes the form $$W = - \Delta \,H$$ when applied to :
A
A closed system undergoing a reversible adiabatic process.
B
An open system undergoing an adiabatic process with negligible changes in kinetic and potential energies.
C
A closed system undergoing a reversible constant volume process.
D
A closed system undergoing a reversible constant pressure process.
GATE ME Subjects
Engineering Mechanics
Machine Design
Strength of Materials
Heat Transfer
Production Engineering
Industrial Engineering
Turbo Machinery
Theory of Machines
Engineering Mathematics
Fluid Mechanics
Thermodynamics
General Aptitude
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