1
GATE ME 1993
Subjective
+2
-0
In the vicinity of the triple point, the vapour pressures of liquid and solid ammonia are respectively given by
\eqalign{ & \ln \,\,P = 15.16 - 3063/T \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,and \cr & \ln \,\,P = 18.70 - 3754/T \cr}

Where $$p$$ is in atmospheres and $$T$$ is in Kelvin. What is the temperature at the triple point.

2
GATE ME 1993
Subjective
+2
-0
A vessel of volume $$\,\,1.0\,\,{m^3}$$ contains a mixture of liquid water and steam in equilibrium at $$1.0$$ bar.Given that $$90\%$$ of the volume is occupied by the steam, find the dryness fraction of the mixture. Assume, at $$1.0$$ bar, $${\,{v_f} = 0.001\,\,{m^3}/kg}$$ and $${\,{v_g} = 1.7\,\,{m^3}/kg}.$$
3
GATE ME 1993
+1
-0.3
An insulated rigid vessel contains a mixture of fuel and air. The mixture is ignited by a minute spark. The contents of the vessel experience.
A
Increase in temperature, pressure and energy
B
Decrease in temperature, pressure and energy
C
Increase in temperature and pressure but no change in energy
D
Increase in temperature and pressure but decreases in energy
4
GATE ME 1993
+1
-0.3
A body of weight $$100$$ $$N$$ falls freely a vertical distance of $$50m$$.The atmospheric drag force is $$0.5N.$$ For the body, the work interaction is
A
$$+5000$$ $$J$$
B
$$-5000$$ $$J$$
C
$$-25$$ $$J$$
D
$$+25$$ $$J$$
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