1
GATE ME 2005
+2
-0.6
The following table of properties was printed out for saturated liquid and saturated vapour of ammonia. The titles for only the first two columns are available. All that we know is that the other columns (columns $$3$$ to $$8$$) contain data on specific properties, namely, internal energy $$(kJ/kg),$$ enthalpy $$(kJ/kg)$$ and entropy $$(kJ/kg.K).$$

The specific enthalpy data are in columns

A
$$3$$ and $$7$$
B
$$3$$ and $$8$$
C
$$5$$ and $$7$$
D
$$5$$ and $$8$$
2
GATE ME 2005
+2
-0.6
The following table of properties was printed out for saturated liquid and saturated vapour of ammonia. The titles for only the first two columns are available. All that we know is that the other columns (columns $$3$$ to $$8$$) contain data on specific properties, namely, internal energy $$(kJ/kg),$$ enthalpy $$(kJ/kg)$$ and entropy $$(kJ/kg.K).$$

When saturated liquid at $${40^ \circ }C$$ is throttled to $$- {20^ \circ }C,$$ the quality at exit will be

A
$$0.189$$
B
$$0.212$$
C
$$0.231$$
D
$$0.788$$
3
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 $${\,{v_g} = 1.7\,\,{m^3}/kg}.$$
4
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.

GATE ME Subjects
EXAM MAP
Medical
NEET