Question 1

You're draining a thermal oil system that was running normally a short time ago. Before opening the drain point, what should you confirm?

Accepted Answer

That the system has cooled and depressurised, and you are positioned clear of the drain point's discharge path On the dredger MV Amazone, two crew members draining a thermal oil system after months of contamination were sprayed with hot oil, suffering severe burns. The investigation found company procedures lacked clear instructions for safe drainage — confirming the system has cooled and depressurised, and standing clear of the discharge path, are essential before opening any drain point on a hot oil system.

Question 2

A thermal oil system has been contaminated and needs draining for cleaning. The written procedure tells you to open the drain valve but doesn't specify a cooling-down period or PPE. What should you do?

Accepted Answer

Treat the gap as a hazard in its own right: apply a suitable cooling/depressurising period and full PPE before proceeding, and raise the procedure gap with the Chief Engineer The FEBIMA investigation into the MV Amazone incident found that although the crew followed company procedures, those procedures lacked clear instructions for safely draining a thermal oil system. A procedure that's silent on cooling time and PPE for a hazardous task is a gap to be closed before the job starts — not a green light to skip those precautions.

Question 3

You notice that a drain point on a hot system is positioned in a way that increases the risk of anyone operating it being sprayed if oil escapes under pressure. What's the correct next step?

Accepted Answer

Report it through the SMS as a hazard observation, so the design risk can be assessed and either modified or controlled by procedure In the MV Amazone case, the investigation specifically found that the position of the drainage point increased the risk of severe burns to anyone carrying out the task. A known design hazard like this should be reported through the safety management system so it can be engineered out or properly controlled — not left for the next person to discover the hard way.

Engineering / Technical Practice Questions