MEK Exit Exam • Set 4 Question 4 of 30
Function of crankcase lubricating oil in a diesel engine is to reduce friction between moving parts, cooling the parts and to _______________
✓
Direct Answer
Option B: Prevent corrosion
Besides reducing friction and cooling, lubricating oil in the crankcase also serves to prevent corrosion on internal engine components. It forms a protective film that inhibits rust and oxidation, especially during periods of inactivity.
All Options
A
Improve combustion
B
Prevent corrosion
(Correct Answer)
C
Supply power
D
Turn the crankshaft
Detailed Explanation & Context
Besides reducing friction and cooling, lubricating oil in the crankcase also serves to prevent corrosion on internal engine components. It forms a protective film that inhibits rust and oxidation, especially during periods of inactivity.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Marine Engineering Knowledge (MEK).
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