Final answer:
In an internal combustion engine, the spark plug is located near the center in a normal combustion chamber. This allows for uniform combustion. In a premature combustion chamber, the location of the spark plug can cause uneven burning and knocking.
Step-by-step explanation:
In an internal combustion engine, the combustion chamber is where the fuel and air mixture is ignited. There are two types of combustion chambers: (a) normal combustion and (b) premature combustion. In a normal combustion chamber, the spark plug is located near the center of the chamber. The spark plug ignites the fuel and air mixture, and the combustion spreads uniformly outward.
For example, in a gasoline engine, the spark plug is positioned in the center of the combustion chamber to ensure that the combustion spreads evenly and efficiently. This allows for optimal power and performance.
On the other hand, in a premature combustion chamber, the spark plug may be located at the sides or edges of the chamber. This can lead to uneven burning, causing knocking and pinging.