What impact does a baffle have on liquid flow in a cargo tank?

A baffle in a cargo tank serves a crucial role in managing the movement of liquid. By design, a baffle is a partition that helps to control the flow of liquid as it moves within the tank. The primary purpose of a baffle is to reduce the possibility of sloshing or excessive movement of the liquid, which can occur during transport due to changes in speed or direction.

When a baffle is present, it creates a barrier that disrupts the smooth flow of liquid, thereby slowing down the overall movement of the liquid toward the outlet. This controlled flow helps to stabilize the liquid, preventing it from moving chaotically, which can lead to hazards during transportation. Consequently, the presence of baffles effectively decreases the flow rate of the liquid when compared to an unbaffled tank, making it more manageable and safe.

The other options do not accurately reflect the effect of baffles on liquid flow. While baffles might seem like they could increase flow or have no effect, their primary function is to decrease the speed of the liquid's movement to enhance safety and stability during transport.