The octane rating of petrol is primarily a measure of what characteristic of the fuel?

Explanation

The octane rating of petrol measures the fuel’s resistance to a form of premature, uncontrolled ignition inside an engine known as knocking, or pinging, which can occur when fuel ignites too early or unevenly under the pressure of compression rather than being ignited precisely by the spark plug. A higher octane rating generally indicates greater resistance to this premature ignition, which is why higher-performance or higher-compression engines often require or benefit from higher-octane fuel. Using a lower octane fuel than an engine is specifically designed for can potentially lead to inefficient combustion and, over time, engine damage. Explore more Everyday Science MCQs on mcqstutor to keep practicing.