Final answer:
The check valve in the CNG fuel receptacle is designed to prevent the reversed flow of gas.
Step-by-step explanation:
In the context of Physics, the check valve in the CNG fuel receptacle is designed to prevent the reversed flow of gas. It ensures that the compressed natural gas (CNG) flows only in one direction, from the receptacle to the engine. This prevents potential accidents and provides safety while using CNG as a fuel.
The check valve acts as a one-way gate, allowing the gas to flow forward while blocking any backward flow. It works based on a mechanical principle and typically consists of a movable valve element that opens when there is pressure on one side (from the CNG receptacle) and closes when there is pressure on the other side.
For example, if the CNG fuel receptacle is disconnected or damaged, the check valve prevents the gas from flowing backward into the receptacle. This ensures that the gas remains within the intended system and avoids any potential leaks or accidents.