PSSR Exit Exam • Set 6 Question 22 of 30

What safety step is mandatory before carrying out maintenance on hydraulic deck machinery?

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Direct Answer

Option A: Depressurize hydraulic accumulators and lines, isolate power, and lock out controls

High-pressure hydraulic fluid pinhole leaks can penetrate human skin, causing gangrene and severe tissue necrosis; lines must be completely depressurized first.

All Options

Depressurize hydraulic accumulators and lines, isolate power, and lock out controls (Correct Answer)

Loosen hose fittings under full hydraulic pressure

Start hydraulic pump at maximum RPM

Fill reservoir to overflowing

Detailed Explanation & Context

High-pressure hydraulic fluid pinhole leaks can penetrate human skin, causing gangrene and severe tissue necrosis; lines must be completely depressurized first.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Personal Safety & Social Responsibilities (PSSR).

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