Final answer:
An engine with both valves in the cylinder head is called an overhead valve (OHV) engine, often found in internal combustion engines.
Step-by-step explanation:
An engine that has both valves in the cylinder head is known as an overhead valve (OHV) engine. This configuration, which includes both intake and exhaust valves located in the head, is frequently found in internal combustion engines. During the intake stroke, air is mixed with fuel. During the compression stroke, the air-fuel mixture is rapidly compressed as the piston rises with the valves closed. Following this, the ignited air-fuel mixture expands during the power stroke, performing work on the piston. Afterwards, the exhaust stroke expels the hot gas and prepares the engine for the next cycle.