Question 720Steam Plants - Assistant Engineer

The correct answer is B) gland seal steam pressure. The gland seal regulator in the illustration is used to regulate the steam pressure in the gland seal, which is a critical component in maintaining the integrity of the steam system. The "I" in the illustration represents the point where the gland seal steam pressure actuates the regulator, controlling the flow of steam to the gland seal and maintaining the desired pressure. The other options are incorrect because they do not directly regulate the gland seal steam pressure. Control air pressure (A), lube oil pressure (C), and steam throttle pressure (D) may be related to the overall steam system, but they do not specifically control the gland seal steam pressure as indicated in the illustration.