Question 256General Subjects - Assistant Engineer

The correct answer is D) Raising the blow down adjusting ring further decreases the area of exposure to pressure after the valve pops and as a result, the valve blow down will increase. The reasoning is that the blow down adjusting ring controls the area of the valve that remains exposed to pressure after the valve "pops" or opens. Raising the adjusting ring decreases this exposed area, which in turn increases the blow down, or the pressure drop across the valve after it opens. This is the basic principle of how the blow down adjusting ring functions to control the valve's behavior. The other options are incorrect because they state the opposite effect - that raising the adjusting ring would decrease the blow down, when in fact it increases the blow down.