Class 2 (2nd Engineer) MEKM 📅 Jan 2018

Exam Question

With reference to the behavior of fabricated bed plates & frames in service.

(a) Identify the various forces imposed simultaneously upon them.

(b) Explain how engine structure withstands these forces.

Reference Answer

(a) Forces Imposed Simultaneously on Bedplate and Frames:
The weight of the engine and its components imposes a static load on the bedplate.
High cyclic gas pressures during combustion impose alternating tensile and compressive forces on the engine structure.
Acceleration and deceleration of the piston and connecting rod cause inertia forces, which fluctuate with engine operation.

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