Class 4 (4th Engineer) MEKM 📅 Jun 2023

Exam Question

(a) Draw a simple sketch of turbocharger, describing each component. (8)

(b) Describe how compressed air is delivered by the turbocharger to main engine? (4)

(c) What arrangement is provided on Turbocharged 2-Stroke main Diesel engine to provide compressed air while starting of main engine. (4)

Reference Answer

### (a) Turbocharger Sketch and Components (8 Marks)
A turbocharger is a mechanical device that utilizes the engine's exhaust gas energy to drive a centrifugal compressor, which in turn supplies high-pressure, high-density air to the engine cylinders for combustion. This process, known as supercharging or turbocharging, significantly increases the engine's power output and thermal efficiency.
**(A diagram is essential for this part of the answer)**
Key components are divided into three main sections: the Turbine side, the Compressor side, and the central Rotor and Bearing assembly.

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