Commercial Pilot License (CPL) 2026 – 400 Free Practice Questions to Pass the Exam

The role of exhaust gases in the operation of turbochargers is critical because they drive the compressor. A turbocharger functions by using the energy of the engine's exhaust gases to spin a turbine. As the exhaust is expelled from the engine, it enters the turbocharger and causes the turbine to rotate. This turbine is connected to a shaft that also drives the compressor side of the turbocharger, which is responsible for drawing in and compressing the incoming air into the engine.

By doing this, the turbocharger allows for more air to enter the combustion chamber, which enables more fuel to be burned and ultimately increases the engine's power output without significantly increasing its size or weight. This process enhances the efficiency and performance of the engine, making it crucial for many high-performance and commercial aircraft.

While the other options are relevant to different aspects of engine operation, they do not accurately describe the primary function of exhaust gases in the context of turbocharging. Cooling engine components is part of engine management but does not involve the turbocharger operation. Increasing cabin pressure pertains more to cabin pressurization systems in an aircraft rather than turbocharging. Reducing fuel consumption may be a secondary benefit of increased efficiency from turbocharging but does not directly stem from the role of exhaust gases.