Low boost in a turbocharged engine can be caused by excessive bearing drag.

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Multiple Choice

Low boost in a turbocharged engine can be caused by excessive bearing drag.

Explanation:
Bearing drag inside a turbocharger directly affects how fast the compressor can spin and build pressure. When there’s excessive friction in the bearings, more of the exhaust-driven energy is wasted overcoming that friction instead of accelerating the compressor wheel. As a result, the compressor can’t reach the RPM needed to develop the desired boost, so boost pressure stays low. In short, higher bearing friction reduces the turbo’s ability to build boost, making the statement true.

Bearing drag inside a turbocharger directly affects how fast the compressor can spin and build pressure. When there’s excessive friction in the bearings, more of the exhaust-driven energy is wasted overcoming that friction instead of accelerating the compressor wheel. As a result, the compressor can’t reach the RPM needed to develop the desired boost, so boost pressure stays low. In short, higher bearing friction reduces the turbo’s ability to build boost, making the statement true.

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