Crank pin are lubricated by

Solution (By Examveda Team)

Crank pins are the important parts of an engine's crankshaft that connect the connecting rods to the crankshaft. They need proper lubrication to reduce friction and wear.

Let's look at the options:

Option A: Injector provided in MOG: While some engines might use injectors for fuel, they are not typically used for lubricating crank pins.

Option B: Internal drill holes in crankshaft: This is a common and effective method. Oil is pumped through drilled passages within the crankshaft, delivering it directly to the crankpins.

Option C: Splash system: A splash system uses oil that is slung from rotating parts to lubricate other components. This method might provide some lubrication to the crankpins, but it's less precise and reliable than a pressure system.

Option D: Gravity system: Gravity systems rely on oil flowing downwards. This wouldn't be effective for lubricating crankpins, which are in motion and require consistent oil delivery under pressure.

Therefore, the most common and effective method is using internal drill holes in the crankshaft (Option B).