Question 145Motor Plants - Assistant Engineer

The correct answer is D) cylinder head. The cylinder head is the component labeled "3" in the illustration MO-0122. The cylinder head is the top part of the diesel engine cylinder, which houses the intake and exhaust valves, as well as the fuel injector. It is responsible for controlling the flow of air and fuel into and out of the cylinder during the engine's operating cycle. The other options are incorrect because: A) the scavenging air space is not a component of the engine, but rather the area where the fresh air enters the cylinder; B) the cylinder liner is the inner lining of the cylinder, not the cylinder head; and C) the head valve assembly is a separate component that controls the opening and closing of the intake and exhaust valves, not the entire cylinder head assembly.