In the illustration shown, if a crankcase...

Question 1 / 270705eccefa1bacbc34ba4d47470

Question 1 of 270705eccefa1bacbc34ba4d47470

In the illustration shown, if a crankcase explosion occurs in a diesel engine, which of the following will occur? See illustration MO-0105.

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Question 1 of 27070

In the illustration shown, if a crankcase explosion occurs in a diesel engine, which of the following will occur? See illustration MO-0105.

If the question has a related picture, it will appear here.

🔍 Key Concepts

• Crankcase relief valve operation – how it protects the crankcase during an internal explosion or overpressure • Direction of gas pressure from inside the crankcase toward the atmosphere in the drawing • Which parts are designed to move against the spring (#11) when pressure rises

💭 Think About

• From which side (left or right) does the explosion pressure act, based on how the valve is mounted to the crankcase wall? • Looking at the pivot points and guides, which numbered piece is actually the movable valve element that would be pushed outward by pressure, and which parts are fixed or only used for manual testing? • If the valve opens, what must happen to spring #11’s length – does it get longer (stretched) or shorter (compressed)?

✅ Before You Answer

• Verify which components are rigidly attached to the crankcase (they will not translate when pressure rises). • Trace the line of action of the spring #11 and see which numbered piece it is pulling toward the crankcase in the normal (closed) position. • Confirm which piece would move to create an opening between the crankcase interior and the outside air; that tells you the direction of motion for the correct choice.

Question 1 of 27070

In the illustration shown, if a crankcase explosion occurs in a diesel engine, which of the following will occur? See illustration MO-0105.

Piece #2 will move to the right

Piece #5 will rotate counterclockwise as viewed from the right

Piece #7 will move to the left

Spring #11 will be compressed

Question 1 / 270705eccefa1bacbc34ba4d47470

Question 1 of 270705eccefa1bacbc34ba4d47470

In the illustration shown, if a crankcase explosion occurs in a diesel engine, which of the following will occur? See illustration MO-0105.

Back

Question 1 of 27070

In the illustration shown, if a crankcase explosion occurs in a diesel engine, which of the following will occur? See illustration MO-0105.

If the question has a related picture, it will appear here.