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CHEMCO Exit Exam • Set 2 Question 9 of 30

What is the function of high level and overfill alarms on chemical cargo tanks?

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Direct Answer

Option A: Provide audible/visual warnings at 95% and 98% capacity to prevent overflow

High-level alarms, typically set at 95% capacity, and overfill alarms, often at 98%, are critical safety devices. They provide timely audible and visual warnings to the deck crew and bridge, preventing tank overflow and potential environmental pollution or hazardous spills, as mandated by operational safety procedures.

All Options

A
Provide audible/visual warnings at 95% and 98% capacity to prevent overflow (Correct Answer)
B
Measure ship roll
C
Signal pump room light
D
Indicate empty tank

Detailed Explanation & Context

High-level alarms, typically set at 95% capacity, and overfill alarms, often at 98%, are critical safety devices. They provide timely audible and visual warnings to the deck crew and bridge, preventing tank overflow and potential environmental pollution or hazardous spills, as mandated by operational safety procedures.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Chemical Tanker Cargo Operations (CHEMCO).

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