Q1: The shape of fire hose nozzle is generally kept

ANS:B - convergent

The shape of a fire hose nozzle is generally kept divergent. A divergent nozzle widens gradually as it extends away from the hose, allowing the water jet to disperse over a larger area. This divergence helps in controlling the direction and spread of the water jet, making it more effective in firefighting applications. By widening the nozzle, the water velocity decreases, which helps in reducing the force of the water stream and enables firefighters to control the flow of water more effectively. Additionally, the divergent shape helps to minimize the impact of water on the surface being sprayed, reducing the risk of damage. Therefore, the shape of a fire hose nozzle is typically divergent.