Question 15 of 120

What is the purpose of a pressure relief valve on some tank vehicles?

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To release excess pressure inside the tank before it can rupture the tank
To lock the tank shut during transport
To measure how much liquid remains inside the tank using a built-in pressure sensor
To increase the flow rate during unloading

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Correct answer to question 15 (Tank Vehicles): To release excess pressure inside the tank before it can rupture the tank

Why

Some cargo builds up internal pressure during transport, and the relief valve exists to vent that pressure safely rather than let it build until the tank itself fails.

Updated: November 2026

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What is the purpose of a pressure relief valve on some tank vehicles?

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