Class 2 (2nd Engineer) MEKM 📅 Feb 2019

Exam Question

With Respect to Main Engine Turbochargers:

(a) Explain why cleanliness throughout the turbochargers system is critical to engine performance.

(b) Describe an in-service cleaning procedure for gas and air sides of a turbocharger indicating safety precautions to be observed.

Reference Answer

(a) Importance of cleanliness of Turbocharger for engine performance:
Turbine Side:
Soot accumulation and deposits on the turbine nozzle ring and blades alter their aerodynamic profile, reducing energy conversion efficiency. This leads to increased exhaust back pressure, further reducing turbocharger performance and impacting engine power output.
Dirty Suction Air Filter :

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