An MC 307/DOT 407 low-pressure chemical carrier is designed to carry chemicals with pressures not to exceed ______ psi.

An MC 307/DOT 407 low-pressure chemical carrier is designed to carry chemicals with pressures not to exceed ______ psi.

• A. 60.0
• B. 20.0
• C. 40.0
• D. 10.0

Answer: (C)

Low-pressure chemical carriers like MC-307/DOT-407 are built to handle liquids with relatively low vapor pressures, with a maximum design (and operating) pressure of 40 psi. This 40 psi limit is the amount of pressure the tank and its relief system are designed to withstand safely while transporting chemicals. Transporting substances with higher vapor pressures would require a different, higher-pressure tanker. The other numbers don’t match the designated class: 60 psi would imply a higher-pressure design, while 10 or 20 psi would be below the standard capability of this tank type.

Low-pressure chemical carriers like MC-307/DOT-407 are built to handle liquids with relatively low vapor pressures, with a maximum design (and operating) pressure of 40 psi. This 40 psi limit is the amount of pressure the tank and its relief system are designed to withstand safely while transporting chemicals. Transporting substances with higher vapor pressures would require a different, higher-pressure tanker. The other numbers don’t match the designated class: 60 psi would imply a higher-pressure design, while 10 or 20 psi would be below the standard capability of this tank type.