MEK Exit Exam • Set 3 Question 5 of 30

One of the function of lubricating oil in a diesel engine is to reduce

✓

Direct Answer

Option C: friction between moving parts

The primary function of lubricating oil in a diesel engine is to reduce friction between moving parts, thereby minimizing wear and heat generation. It also provides cooling and sealing, but friction reduction is its most crucial role.

All Options

weight of the engine

wexhaust gases

friction between moving parts (Correct Answer)

exhaust temperatures

Detailed Explanation & Context

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Marine Engineering Knowledge (MEK).

Practice Full MEK Set 3

Test yourself with 30 interactive questions, live timer, and instant score.

Launch Practice Simulator →

Question Discussion & Notes

Have a doubt, memory trick, or exam update? Share your insights with fellow mariners.

Loading mariner discussions...

« Previous Question Next Question »

More Questions in MEK Set 3

View All 30 →

Q1 If cooling water becomes less in a diesel engine the engine will Q2 Diesel engine bearing will get damaged if supply of ___________ is not enough Q3 Speed of diesel engine is adjusted by changing the supply of Q4 While diesel engine is operating ,one of the important pressure to check is ______ Q5 One of the function of lubricating oil in a diesel engine is to reduce Q6 Function of crankcase lubricating oil in a diesel engine is to ____ Q7 The lower most ring on a diesel engine piston is called Q8 For good combustion,the color of the exhaust from diesel engine should be Q9 Ships propeller is fitted to Q10 The type of engine normally used for generators on a ship is ____________