Question 9 UFIV01 - Chief Engineer - UFIV

The Correct Answer is C ### Why Option C (Engine lubricating oil supply header pressure) is correct: The **engine lubricating oil supply header pressure** must be checked **FIRST** upon starting any internal combustion engine, including a deck winch drive engine. Lubricating oil is essential for reducing friction between moving parts (such as pistons, bearings, and crankshaft) and carrying away heat. Without immediate and adequate lubrication pressure: 1. **Metal-to-metal contact** will occur instantly. 2. This leads to rapid **overheating and severe mechanical damage** (e.g., scoring of cylinder liners, bearing failure, or seizure) within a matter of seconds. Therefore, confirming oil pressure immediately after starting is the most critical step to prevent catastrophic, immediate engine failure. ### Why the other options are incorrect: * **A) Fuel oil supply header pressure:** While fuel pressure is necessary for the engine to continue running effectively, a temporary drop or absence of pressure will simply cause the engine to stop or run poorly. It will not cause immediate physical destruction of the engine components upon startup like lack of lubrication will. * **B) Cylinder jacket water pump discharge pressure:** Cooling water pressure is vital for managing operating temperature, but engines can generally run for a short period (minutes) without immediate cooling damage, especially when cold starting. Lack of cooling leads to overheating damage, but lack of lubrication leads to immediate frictional damage. * **D) Winch gear oil pump discharge pressure:** This parameter relates to the lubrication and operation of the winch gearbox and hydraulic system, not the engine itself. The engine's structural integrity and immediate survival depend on its own internal lubrication system, not the external machinery it drives.