PST Exit Exam • Set 7 Question 18 of 30

The liquid inside a standard wet card magnetic compass is a specific mixture of:

✓

Direct Answer

Option B: Distilled water and pure ethylene alcohol

The compass card in a liquid-filled magnetic compass is suspended in a mixture of distilled water and pure ethylene alcohol, which prevents freezing at low temperatures and ensures smooth damping of the card.

All Options

Glycerin and heavy oil

Distilled water and pure ethylene alcohol (Correct Answer)

Seawater and kerosene

Pure acetone

Detailed Explanation & Context

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Personal Survival Techniques (PST).

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Q1 What is the purpose of the hydrostatic interlock in the keel of an enclosed lifeboat? Q2 Steering a motor lifeboat broadside (parallel) to heavy waves and sea could cause it to: Q3 With the water sprinkler system and the air system turned on and all hatches shut, an enclosed survival craft will provide protection from: Q4 Which data is NOT painted on the bow of a lifeboat? Q5 Every lifeboat requires to be launched into the water and maneuvered at least once in every: Q6 The mandatory distress pyrotechnics required to be kept inside a lifeboat container are: Q7 When a rescue vessel approaches a lifeboat in heavy seas, the person in charge of the lifeboat should: Q8 Which of the following survival equipment items is considered consumable? Q9 Which will be the worst of emergencies that you would face if it happens at sea? Q10 A life jacket has which of the following mandatory safety attachments on it?