Which of the following is a feature of a power turbine blade that is not found on a high temperature turbine blade?

Correct Answer: Option A — Interlocking shrould tips.

Interlocking shroud tips are a common feature on power turbine blades to improve aerodynamic efficiency and dampen vibrations. By connecting adjacent blades, the shrouds create a continuous ring that minimizes tip leakage and reduces the risk of blade flutter, a feature less critical in the high-pressure, high-temperature gas generator stages.