What is the role of a lever in a pilot-operated waste gate control system?

• A. It measures boost pressure
• B. It allows manual adjustment of waste gate position by the pilot
• C. It cools the turbine
• D. It sets fuel flow

Answer: (B)

The lever in a pilot-operated waste gate system gives the pilot a direct manual control over the waste gate position. By moving the lever, the pilot changes the gate opening via a linkage to the actuator, setting how much exhaust bypasses the turbine. A more closed gate increases boost because less exhaust is diverted, while opening the gate reduces boost by routing more exhaust around the turbine. This manual override is useful for starting, testing, or overriding automatic control when needed. It isn’t used to measure boost pressure, cool the turbine, or set fuel flow.