MDE 4 Q3

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Question: Where is the thrust bearing typically fitted in a large medium-speed diesel engine turbocharger?

D) At the intake manifold to reduce air pressure fluctuations

A) Between the compressor wheel and the turbine wheel

C) On the shaft between the compressor side and the bearing housing

B) On the exhaust manifold to support the turbocharger housing

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Question: How is the thrust bearing typically lubricated in a large medium-speed diesel engine turbocharger?

B) By engine coolant circulating through the bearing housing

A) By grease that is manually applied during maintenance intervals

D) By the engine’s lubricating oil system, which circulates oil through the turbocharger bearing housing

C) By a dedicated oil pump that supplies pressurized lubricating oil directly to the bearing

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Question: Why is a thrust bearing necessary in a large medium-speed diesel engine turbocharger?

C) To enhance the cooling of the turbocharger by directing airflow

A) To support the weight of the turbocharger and reduce vibrations

B) To absorb axial forces generated by the high-speed rotation of the turbocharger's compressor and turbine wheels

D) To maintain proper alignment of the turbocharger housing with the engine block

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