MDE 4 Q4

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Question: What is the primary purpose of the volute casing in a main engine turbocharger?

D) To maintain the alignment of the turbocharger shaft with the engine block

B) To collect and direct compressed air from the compressor wheel into the engine's intake manifold

A) To house the turbocharger bearings and ensure proper lubrication

C) To reduce the temperature of the exhaust gases before they enter the turbine

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Question: What is the primary purpose of the diffuser in a main engine turbocharger?

B) To slow down the high-velocity air exiting the compressor and convert its kinetic energy into pressure

A) To increase the temperature of the compressed air before it enters the cylinders

D) To filter the intake air before it enters the compressor wheel

C) To reduce the backpressure in the exhaust system and improve turbocharger efficiency

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Question: What is the primary purpose of the nozzle ring in a main engine turbocharger?

C) To cool the exhaust gases before they enter the turbine

A) To regulate the flow of lubricating oil to the turbocharger bearings

B) To direct and accelerate exhaust gases onto the turbine wheel for improved energy extraction

D) To increase the pressure of intake air before it reaches the compressor wheel

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