Question 1

What is the purpose of a fuel tank breather, and what problem can occur if it becomes blocked?

Accepted Answer

The breather allows air to enter the tank as fuel is drawn out (and escape as fuel expands) — if it becomes blocked, a vacuum can form in the tank as fuel is consumed, which can restrict or stop fuel flow to the engine, sometimes only becoming apparent once the engine has been running for a while A fuel tank needs to breathe as its contents are drawn down or expand with temperature — a blocked breather can starve the engine of fuel through vacuum lock, a fault that's easy to overlook because the tank itself may still show plenty of fuel, and the symptom (gradually falling power or stalling) can look like several other fuel or engine problems.

Question 2

You're asked to test a deck crane grab after electrical repairs nearby. As the grab is hoisted, what should have happened first?

Accepted Answer

The area within the grab's swing radius should be cleared of personnel before the lift On the bulk carrier Fairfield Eagle, a crew member working nearby was struck and fatally injured when a grab being test-lifted after repairs swung unexpectedly. The investigation found the area should have been cleared and barriered before the test lift began.

Question 3

A toolbox talk held before a lifting operation should explicitly cover which of the following?

Accepted Answer

Who must remain clear of the exclusion zone while the lift takes place A toolbox talk exists to make sure everyone present understands the danger zones, the abort signal, and — critically — who must not be in the area while the lift happens. The RMIMA investigation into the Fairfield Eagle fatality found the toolbox talk had not made this clear.