Question 35Steam Plants - Assistant Engineer

The correct answer is A) the auxiliary stop valve fully open and the auxiliary stop-check valve used to regulate the amount of flow. Under emergency operating conditions, the auxiliary stop valve should be fully open to allow the maximum amount of feed water to flow into the boiler. The auxiliary stop-check valve should then be used to regulate the amount of feed water flow, as it is the valve designed for this purpose. This ensures the boiler receives the necessary feed water to maintain proper water levels and prevent damage. The other options are incorrect because they either have the valves in the wrong positions (B, D) or rely on an improper method of regulating feed water flow (C).