Generally three systems are used to vary the position of the waste gate, which are they?

• A. A lever or second throttle operated by the pilot; Connected directly to the throttle; Automatic control (pilot sets required manifold pressure, aneroid capsule increases or decreases amount of turbo charging)
• B. A lever operated by the mechanic; Directly linked to exhaust valve; Manual override
• C. Automatic electronic controller only
• D. Hydraulic pressure and manual adjustment

Answer: (A)

The key idea is how a waste gate is positioned to control turbocharger boost. In many aircraft engines, three main control approaches are used: a manual pilot-operated lever or second throttle to set boost, a direct mechanical linkage that makes the waste gate follow throttle movement, and an automatic control that uses a pressure-sensing device (an aneroid capsule) to adjust the waste gate and maintain the desired manifold pressure. The option that describes all three elements—pilot-set manifold pressure, direct linkage to the throttle, and automatic control via an aneroid capsule—best fits how waste gates are commonly managed, because it covers both manual and automatic methods and shows how boost can be controlled both by pilot input and by automatic sensing of boost pressure. The other choices describe mechanisms that are not standard combinations for waste gate control, such as a mechanic-operated lever linked to an exhaust valve, or configurations that rely solely on electronic or hydraulic/manual adjustments, which don’t reflect the typical trio of manual, direct-throttle, and automatic aneroid control.