If a single slab cylinder head is used on an in-line 6-cylinder diesel engine, how many engine cylinders will the cylinder head cover?

In an in-line 6-cylinder diesel engine, the design features one long cylinder head that encompasses all six cylinders. The configuration allows for a single slab of material to be machined in such a way that it effectively houses each cylinder within its design. This integrated approach not only simplifies the manufacturing process but also contributes to the overall efficiency of the engine by providing consistent cooling and structural integrity across all cylinders. Therefore, a single slab cylinder head will cover all six cylinders, hence the answer is correct.