1
GATE ME 2008
MCQ (Single Correct Answer)
+2
-0.6
A rigid, insulated tank is initially evacuated. The tank is connected with a supply line through which air ( assumed to be ideal gas with constant specific heats) passes at $$1$$ $$MPa,$$ $${350^ \circ }C.$$ A valve connected with the supply line is opened and the tank is charged with air until the final pressure inside the tank reaches $$1$$ $$MPa.$$ The final temperature inside the tank. GATE ME 2008 Thermodynamics - First Law of Thermodynamics Question 20 English
A
Is greater than $${350^ \circ }C$$
B
Is less than $${350^ \circ }C$$
C
Is equal to $${350^ \circ }C$$
D
may be greater than less than, or equal to $${350^ \circ }C$$, depending on the volume of the tank.
2
GATE ME 2002
MCQ (Single Correct Answer)
+2
-0.6
What is the speed of sound in Neon gas at a temperature of $$500$$ $$K$$ (Gas constant of Neon is $$0.4210$$ $$kJ/kg$$-$$K$$)?
A
$$492$$ $$m/s$$
B
$$460$$ $$m/s$$
C
$$592$$ $$m/s$$
D
$$543$$ $$m/s$$
3
GATE ME 2001
MCQ (Single Correct Answer)
+2
-0.6
A small steam whistle (perfectly insulated and doing no shaft work) causes a drop of $$0.8$$ $$kJ/kg$$ in the enthalpy of steam from entry to exit. If the kinetic energy of the steam at entry is negligible, the velocity of the steam at exit is
A
$$4$$ $$m/s$$
B
$$40$$ $$m/s$$
C
$$80$$ $$m/s$$
D
$$120$$ $$m/s$$
4
GATE ME 2000
MCQ (More than One Correct Answer)
+2
-0
When an ideal gas with constant specific heats is throttled adiabatically, with negligible changes in kinetic and potential energies
A
$$\Delta h = 0,\,\,\Delta T = 0$$
B
$$\Delta h > 0,\,\,\Delta T = 0$$
C
$$\Delta h > 0,\,\,\Delta s > 0$$
D
$$\Delta h = 0,\,\,\Delta s > 0$$
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