What is the primary function of a turbocharger?

• A. To regulate exhaust temperature.
• B. To increase fuel efficiency only at idle.
• C. To improve engine performance.
• D. To reduce engine noise.

Answer: (C)

A turbocharger’s main function is to boost engine performance by increasing the amount of air entering the engine. It uses energy from exhaust gases to drive a turbine that turns a compressor, pressurizing the intake air so more oxygen is available for combustion. With more air, you can burn more fuel and generate more power and torque without enlarging the engine’s size. This boost is most effective under load and at higher RPMs when the exhaust energy is substantial. It’s not about regulating exhaust temperature, it doesn’t primarily improve fuel efficiency only at idle, and it doesn’t aim to reduce engine noise.