Question 4Motor Plants - QMED

The correct answer is D) supercharging. Supercharging is the process of supplying a diesel engine cylinder with air at a pressure greater than atmospheric pressure. This is done using a supercharger, which is a type of forced induction system that increases the density of the air entering the engine's cylinders, allowing for more fuel to be burned and thus producing more power. The other answer choices are incorrect because: A) Engine displacement refers to the total volume displaced by all the engine's cylinders, not the process of increasing air pressure. B) Super-aspirating is not a recognized term in this context. C) Air injection is a different process of introducing air into the engine, not specifically at a pressure greater than atmospheric.