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Class 4 (4th Engineer) MEKM 📅 Sep 2022

Exam Question

(a) Give four advantages of turbocharging (6)

(b) Sketch and describe a constant pressure turbocharging system, stating its advantages and disadvantages (5)

(c) Sketch and describe a pulse turbocharging system stating its advantages and disadvantages (5)

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Reference Answer

### (a) Four Advantages of Turbocharging
Turbocharging significantly enhances the performance and efficiency of internal combustion engines by utilizing the energy from exhaust gases to force more air into the engine cylinders. This results in several critical advantages:
1. **Increased Power Output for a Given Engine Size/Weight:**
* By forcing a greater mass of air into the combustion chambers (supercharging), more fuel can be efficiently burned per cycle. This directly translates to a substantial increase in Brake Horsepower (BHP) and Mean Effective Pressure (MEP) without increasing the engine's displacement or physical size. For example, a turbocharged engine can produce 50-100% more power than its naturally aspirated counterpart, making it highly advantageous for marine applications where space and weight are critical considerations.

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