Question 375Motor Plants - Assistant Engineer

The correct answer is C) higher torque and higher brake horsepower. Aftercooling of a turbocharged diesel engine results in a higher density of the intake air, which leads to a greater mass of air being drawn into the engine cylinders. This increased air density allows for more fuel to be injected, resulting in higher torque and higher brake horsepower output from the engine. The other options are incorrect because: A) Aftercooling increases both torque and brake horsepower. B) Aftercooling increases both torque and brake horsepower, not decreases them. D) Aftercooling increases both torque and brake horsepower, not decreases them.