Question id 446 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license

An electrically heated capsule rupturing a seal in the pipeline at the engine.
Manual remote control opening a discharge valve.
An electrically fired cartridge rupturing a seal in the head of the bottle.
A mechanical link withdrawing a safety pin and allowing a spring operated plunger to rupture the bottle seal.

Training tests and timed exam simulations ATPL - Airline Transport Pilot license