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Question

Which component typically initiates the oil splash in a splash lubrication system?

This question was previously asked in
RRB NTPC 2025 Graduate Level CBT 1 Question Paper (25-Mar-2026) (Shift 3)
The correct answer is

The rotating crankshaft

The splash lubrication system is a method used in engines to distribute lubrication oil to the various moving components. The key component that typically initiates the splash of oil in this system is the rotating crankshaft. Let's understand why this is the correct answer and rule out the other options:

  1. The rotating crankshaft is designed with splasher arms or dippers attached to it, which dip into the oil sump and splash oil onto the engine's moving parts as the crankshaft rotates. This method ensures that all parts of the engine receive adequate lubrication to reduce friction and wear.
  2. The vibrating cylinder head does not play a role in initiating the oil splash. The cylinder head is a static component where combustion occurs and is not involved in oil distribution.
  3. The intake valve is responsible for allowing air-fuel mixture into the cylinder. It does not have any function related to the lubrication system or splashing oil.
  4. The vibrating crankcase is merely the housing for the engine components and the oil sump. It does not have the mechanism to initiate oil splash.

In conclusion, the rotating crankshaft is the component that initiates the oil splash in a splash lubrication system, ensuring that all engine components are lubricated effectively.

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Important Questions from Lubrication System

  1. Maximum oil pressure in the lubrication system is controlled by the _________.

  2. Water sludge is formed in the crankcase due to the mixing of which of the following?

  3. Which component of an engine lubricating system indicates the level of oil?

  4. Which oil pump is used in stationary diesel engines?

  5. The pressure of the lubricant oil inside an engine is measured by which of the following?

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