Which of the steam losses listed would be associated with a multistage impulse turbine rather than a multistage reaction turbine?

Correct Answer: Option A — Diaphragm packing loss

Diaphragm packing leakage is unique to multistage impulse turbines. Because pressure drops exclusively across the stationary diaphragms containing shaft packing glands, steam can bypass the rotor stages, whereas reaction turbines feature pressure drops across both moving and stationary blades.