What are the three main parts of all dry chemical suppression systems?

The three main parts of all dry chemical suppression systems are indeed the activation mechanism, storage cylinder, and nozzles.

The activation mechanism is vital because it allows for the deployment of the extinguishing agent when a fire is detected. This can be manual or automatic, ensuring that the system can react promptly to a fire occurrence.

The storage cylinder holds the dry chemical agent under pressure, ensuring that it is ready to be released quickly when activated. This cylinder is designed to withstand high pressures and maintain the integrity of the chemical until it is needed.

Nozzles are the components that direct the flow of the dry chemical agent onto the fire. They play a crucial role in ensuring the effective distribution of the extinguishing agent to suppress the flames efficiently.

In contrast, the other choices include elements not specifically associated with dry chemical suppression systems, such as hoses and water supply systems typically linked to water-based firefighting strategies, or equipment that does not relate directly to extinguishing agents. These elements may be useful in various fire suppression systems but are not critical components of dry chemical systems specifically.