Compressed Natural Gas (CNG) Certification 2025 – 400 Free Practice Questions to Pass the Exam

The relationship between temperature and the storage pressure of compressed natural gas (CNG) is governed by the principles outlined in the ideal gas law. As temperature increases, the kinetic energy of the gas molecules also increases, causing them to move more rapidly. This increased movement results in higher pressure within a closed container, such as a CNG storage tank.

In this context, higher temperatures lead to an increase in internal tank pressure because the gas expands and exerts more force against the walls of the tank. This is critical for operational safety and efficiency, as tanks must be rated for specific pressures that take possible temperature variations into account.

Understanding this relationship is essential for safe storage and handling of CNG, as exceeding recommended pressure limits can lead to safety hazards like tank rupture or failure. Therefore, selecting higher temperatures as an influencing factor for increased internal pressure appropriately reflects the physical laws governing gas behavior in storage systems.