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WorksheetsThermo - Steam properties - HN
Total questions: 10
Worksheet time: 8mins
The saturation temperature of water
is 99.6oC
is the constant temperature during evaporation
is higher for saturated steam than for wet steam
all of the above
The density of steam is
dependent on mass
1000 kg/m3
dependent on pressure and temperature
calculated from pV=mRT
The enthalpy needed to evaporate 1 kg of water at 2 bar is
2202 kJ
2707 kJ/kg
2202 kJ/kg
2530 kJ
Wet steam has enthalpy
higher than saturated water
lower than dry steam
dependent on dryness fraction
all of the above
Superheated steam has internal energy
higher than wet steam
decreasing with increasing temperature
increasing with increasing pressure
all of the above
Steam at 1 bar and 110oC is
saturated steam
wet steam
superheated steam
there is not enough data to judge
If saturated water and dry steam enthalpy at certain conditions is 1185 and 2790 kJ/kg respectively, then 50% wet steam enthalpy is:
1205 kJ/kg
802.5 kJ/kg
1988 kJ/kg
3125 kJ/kg
Dry steam has a density of 8.084 kg/m3, what is its pressure?
2 bar
16 bar
16 N/m2
not enough data is provided
Wet steam is coming out of a turbine at 139oC. Which of the values below can be its internal energy?
1100 kJ/kg
2549 kJ/kg
584 kJ/kg
3127 kJ/kg
Superheated steam from a boiler is known to have enthalpy of 3070x103 J/kg at 300oC, what is its pressure?
30 bar
3 MPa
not enough data is given
300 kPa
