Final answer:
The crankcase is not the upper part of the engine block where the valves are located. The valves are actually located in the cylinder head.
Step-by-step explanation:
The crankcase is not the upper part of the engine block where the valves are located. In an internal combustion engine, the crankcase is actually the housing for the crankshaft and other engine components such as the oil pan and pistons.
The valves, on the other hand, are located in the cylinder head, which is mounted on top of the engine block. The cylinder head contains the intake and exhaust valves that control the flow of air and fuel into the cylinders and the expulsion of exhaust gases. Therefore, the statement that the crankcase is the upper part of the engine block where the valves are located is false.