Question 638Steam Plants - Assistant Engineer

The correct answer is A) Pump discharge. The constant pressure governor of a turbine-driven feed pump maintains the pump discharge pressure at a constant value for all capacities. This ensures that the feed pump provides a stable and consistent output pressure to the boiler, regardless of the system's demand or the pump's operating conditions. The other options are incorrect because the constant pressure governor does not maintain the pump suction pressure (B), the turbine inlet pressure (C), or the turbine exhaust pressure (D) at a constant value. These pressures may fluctuate based on the system's operational requirements and the pump's performance characteristics.