Pipe marking color Green corresponds to which substance?

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Prepare for the Navy DCU Indoctrination Test with detailed flashcards and multiple choice questions. Each question includes helpful hints and explanations to ensure you're fully prepared for success on your exam day.

Multiple Choice

Pipe marking color Green corresponds to which substance?

Explanation:
Pipe marking color coding is a quick visual cue that tells you what fluid is in a line, which helps prevent mistakes during maintenance and operation. In this Navy scheme, green marks denote seawater. That means a pipe with green markings is carrying seawater, such as in cooling, ballast, or other seawater systems on the ship. Fresh water, hydraulic oil, and fuel oil use different colors, so they wouldn’t be green. The green designation for seawater helps sailors verify the line at a glance and reduces the risk of cross-connecting or servicing the wrong system.

Pipe marking color coding is a quick visual cue that tells you what fluid is in a line, which helps prevent mistakes during maintenance and operation. In this Navy scheme, green marks denote seawater. That means a pipe with green markings is carrying seawater, such as in cooling, ballast, or other seawater systems on the ship. Fresh water, hydraulic oil, and fuel oil use different colors, so they wouldn’t be green. The green designation for seawater helps sailors verify the line at a glance and reduces the risk of cross-connecting or servicing the wrong system.

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