Question 249Steam Plants - Assistant Engineer

The correct answer is D) The pressure will increase and the specific volume will decrease. When steam is formed in a boiler with all steam stop valves closed and the water level held constant, an increase in the temperature of the steam and water will cause the pressure inside the boiler to increase. This is because the increased temperature results in higher kinetic energy of the steam molecules, leading to higher pressure. As the pressure increases, the specific volume (volume per unit mass) of the steam decreases, as the steam becomes more dense under the higher pressure. The other options are incorrect because they do not accurately describe the relationship between pressure and specific volume when the temperature increases in a closed boiler system.