OCTCO/OCTF Exit Exam • Set 9 Question 10 of 30

This valve is used in conjunction with closed and restricted measurement equipment to allow measurement in ship tanks that are closed to the atmosphere. Once a portable measurement unit (PMU) is attached to the VCV, the valve is opened and the PMU probe is dropped into the tank to perform the required measurement.

✓

Direct Answer

Option D: vapor control valve (VCV)

A Vapour Control Valve (VCV) is installed on closed gauging standpipes to allow portable UTI/PMU gauging probes to enter sealed tanks without releasing hazardous cargo vapour.

All Options

PMU point

measurement valve

Both (A) and (B)

vapor control valve (VCV) (Correct Answer)

Detailed Explanation & Context

A Vapour Control Valve (VCV) is installed on closed gauging standpipes to allow portable UTI/PMU gauging probes to enter sealed tanks without releasing hazardous cargo vapour.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Oil and Chemical Tanker Cargo Operations (OCTCO/OCTF).

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