ICE MK A-School Practice Exam 2026 – Your All-in-One Guide to Mastering the Exam!

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What does a turbocharger use to spin, and what does it do for the air entering the engine?

Exhaust pressure spins the turbine and increases air in the cylinder

A turbocharger is driven by the energy in exhaust gases. The high-pressure exhaust flow spins the turbine, which is connected to a compressor on the same shaft. As the turbine turns, the compressor draws in intake air and compresses it before it enters the engine. This increases the air density in the cylinders, allowing more oxygen for combustion and boosting power and efficiency. It’s not driven by intake air, battery power, or water pressure, and it increases, rather than decreases, the amount of air entering the cylinder.

Intake air spins the turbine and decreases air in the cylinder

Battery power spins the turbine and increases air in the cylinder

Water pressure spins the turbine and increases air in the cylinder