Question 129Steam Plants - QMED

The correct answer is C) 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 delivers a consistent discharge pressure to the boiler, regardless of the flow rate or load conditions. The other options are incorrect because the constant pressure governor does not maintain the suction pressure (A), the turbine inlet pressure (B), or the turbine exhaust pressure (D) at a constant value. The governor's primary function is to regulate the pump discharge pressure, not these other pressure points in the system.