Question 451Steam Plants - Assistant Engineer

You are correct, the answer A) protect the superheater from overheating is the correct answer. The superheater safety valves are designed to protect the superheater from excessive pressure and overheating. The superheater is a critical component that increases the temperature of the steam, and if the pressure or temperature gets too high, it can damage the superheater. The safety valves are set to open at a specific pressure to release steam and prevent the superheater from being overpressurized and overheated. The other answer choices are incorrect because they do not describe the primary function of the superheater safety valves. The safety valves are not responsible for maintaining steam flow in the auxiliary steam line or desuperheater, nor are they designed to protect the desuperheater from overheating.