USCG Tanker Practice Exam 2025 - Free Tanker License Practice Questions and Study Guide

Question: 1 / 400

What issue may arise from excessive air in the suction line when stripping a tank?

An over pressurized line.

Back pressure.

Loss of suction.

When stripping a tank, excessive air in the suction line can lead to a loss of suction. This occurs because the introduction of air into the suction line creates a mixture that can prevent the pump from effectively drawing liquid. A pump relies on a continuous column of liquid to maintain suction, and the presence of air disrupts this column, decreasing the pump's ability to maintain flow.

Moreover, if the air mixes with the liquid, it can lead to cavitation, which diminishes the pump's efficiency and can potentially cause damage to the pump over time. Therefore, maintaining a liquid-only environment in the suction line is crucial for optimal pump performance during the stripping process.

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Increase of suction.

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