SAMSA Marine Engineer Officer Class 4 CoC Exam Practice Questions - SAMSA Marine Engineer Officer Class 4 CoC (Near-Coastal & Port Operations) Exam (South Africa) Exam

What is the primary cause of thermal stress and micro-cracking in marine engine cylinder liners?

Using low-viscosity synthetic lubricating oil Large temperature differentials between the inner combustion face and outer cooling water jacket face Running the engine continuously at 50% rated load Operating with excessive raw cooling water flow

Correct Answer:

Large temperature differentials between the inner combustion face and outer cooling water jacket face

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