What is the purpose of a fuel supply cylinder in a CNG system?

The primary purpose of a fuel supply cylinder in a compressed natural gas (CNG) system is to store CNG for vehicle use. These cylinders hold the natural gas at high pressures, allowing vehicles that run on CNG to have a sufficient supply of fuel available. This storage capability is crucial because it enables vehicles to operate over longer distances without needing to refuel frequently, similar to how gasoline or diesel fuel systems work.

CNG cylinders are designed to be durable and safe, with a focus on withstanding high pressures, which is essential for maintaining the integrity of the gas during storage and preventing leaks. This storage function plays a vital role in the overall efficiency and usability of vehicles powered by natural gas, ensuring that the energy can be accessed effectively whenever needed.

The other options, while related to different aspects of CNG systems, do not accurately describe the main function of the fuel supply cylinder. Transporting natural gas from its source is typically handled by pipelines or transport vehicles and not the cylinders themselves. Measuring the pressure is a critical function, but it is performed by pressure gauges rather than the storage cylinders. Purifying CNG, while important for ensuring the gas is clean and usable, is managed through separate processes and equipment designed specifically for filtration and purification.