What can result from excessive air in the suction line when stripping a tank?

When excessive air enters the suction line while stripping a tank, the most direct consequence is the loss of suction. This phenomenon occurs because the presence of air creates a situation where the pump cannot effectively create the necessary vacuum to draw liquid from the tank. Essentially, the air disrupts the continuous column of liquid that is needed for proper pump operation, leading to an interruption in flow.

Understanding the mechanics behind it, when a pump operates, it relies on a consistent liquid medium to maintain pressure and ensure that the pump can perform as intended. If air is present, it breaks this liquid column, resulting in the pump losing its ability to maintain suction. Therefore, the correct answer clearly illustrates a critical aspect of pump operation and tank stripping procedures, which is essential for maintaining effective and safe operations in tanker management.

The other answer choices, while they may be related to different operational hazards, do not directly address the immediate consequence of air ingress into the suction line during the stripping process.