Question 68 RVR05 - Master of LT 100 GRT

The Correct Answer is D Ventilate all compartments, see that the machinery is clean and there are no obstructions, is the correct action because safety and operational integrity must be confirmed before starting machinery. 1. **Ventilation:** Machinery spaces, particularly those housing internal combustion engines, can accumulate dangerous levels of volatile fumes (like gasoline or propane vapor) or residual exhaust gases. These fumes are often heavier than air and collect in bilges and low areas, creating an extreme fire or explosion hazard. Ventilation is the essential first step to mitigate this risk. 2. **Cleanliness and Obstructions:** Checking that the machinery is clean and free of obstructions ensures that the equipment can operate properly (e.g., cooling intakes are clear, moving parts are unrestricted) and reduces the risk of mechanical failure or fire caused by oily rags, debris, or tools left behind. This physical inspection is a foundational safety check. **Why the other options are incorrect:** A) **Take for granted that there are no fuel leaks:** This is dangerous. Assuming safety measures without verification is a major cause of maritime and industrial accidents. Fuel leaks (or leaks of other flammable liquids) must always be actively checked, not assumed away. B) **Just turn the key and start up:** This is reckless and ignores all necessary pre-start safety protocols, including checking fluids, ensuring ventilation, and confirming the area is safe and clear. C) **Assume there are no volatile fumes in the engine space:** This is highly dangerous and violates the fundamental safety principle of checking for hazardous conditions. Volatile fumes are a common hazard in machinery spaces and can lead to immediate explosions if ignition sources (like an engine starting) are introduced.