Question

The additive added to the gasoline mixture to prevent knocking sound of engine is ___

• A. Methane
• B. Tetra ethyl lead
• C. Octane
• D. Coke

Answer 1

The correct option is B Tetra ethyl lead

Tetra ethyl lead was commonly used until recently used as an anti –knocking agent which prevents the knocking sounds of the engine, increases the fuel efficiency and help in the wear and tear of valves within the motor. Knocking in the engine occurs when the combustion of fuel mixture present in the cylinder does not start off in response to the ignition by the spark plug.