Final answer:
The correct answer is c) Duo-servo brake. In a duo-servo brake, both the leading shoe and the trailing shoe are self-energizing, meaning that the rotating drum helps to press the brake shoes against the drum with greater force. A non-servo brake has no self-energizing action and relies solely on the hydraulic pressure.
Step-by-step explanation:
The correct answer is c) Duo-servo brake.
A duo-servo brake is a type of drum brake that has self-energizing action. In a duo-servo brake, both the leading shoe and the trailing shoe are self-energizing, meaning that the rotating drum helps to press the brake shoes against the drum with greater force. This self-energizing action allows for more efficient braking.
On the other hand, a non-servo brake has no self-energizing action and relies solely on the hydraulic pressure.