A petrol cap, also known as a gas cap or fuel cap, is a device that seals the opening of a fuel tank in a motor vehicle to prevent fuel from spilling out. It is typically made of plastic or metal and has a spring-loaded mechanism that allows it to be opened and closed easily. Petrol caps are usually located on the side of the vehicle, near the rear wheels.
Petrol caps are important safety devices. They help to prevent fuel from leaking out of the tank, which could create a fire hazard. They also help to keep dirt and debris out of the fuel tank, which can damage the engine. In addition, petrol caps can help to reduce emissions by preventing fuel vapors from escaping into the atmosphere.
