A wet vapour can be completely specified by :
A. pressure only
B. temperature only
C. dryness fraction only
D. specific volume only
E. pressure and dryness fraction
The specific heat of superheated steam in kcal/kg is generally of the order of :
A. 0.1
B. 0.3
C. 0.5
D. 0.8
E. 1.0
One kg of steam sample contains 0.8 kg dry steam; it’s dryness fraction is :
A. 0.2
B. 0.8
C. 1.0
D. 0.6
E. 0.5
Equivalent evaporation is the amount of water evaporated in a boiler from and at :
A. 0°C
B. 100°C
C. saturation temperature at given pressure
D. room temperature
E. 20°C
1 kg.m is equal to :
A. 9.81 Joules
B. All Joules
C. 427 Joules
D. 102 Joules
E. 539 Joules
The critical pressure at which latent heat of vaporisation is zero is :
A. 225.65 kgf/cm2
B. 273 kgf/cm2
C. 100 kgf/cm2
D. 1 kgf/cm2
E. – 1 kgf/cm2
The saturation temperature of steam with increase in pressure increases :
A. linearly
B. rapidly first and then slowly
C. slowly first and then rapidly
D. inversely
E. none of the above
Superheating of steam is done at :
A. constant volume
B. constant temperature
C. constant pressure
D. constant entropy
E. constant enthalpy
The coal requirement per kW hour generation in the thermal power plant is of the order of :
A. 0.1 to 0.2 kg
B. 0.2 to 0.4 kg
C. 0.6 to 0.8 kg
D. 1.0 to 1.5 kg
E. 1.5 to 2 kg
The specific volume of steam with increase in pressure decreases :
A. linearly
B. slowly first and then rapidly
C. rapidly first and then slowly
D. inversely
E. none of the above
