According to regulations, cargo pump rooms, on the tank vessels handling grades A, B, or C liquid cargo, shall be equipped with power ventilation of the exhaust type. What is the time requirement to sufficiently effect a complete change of air?

Correct Answer: Option C — 3 minutes

Title 46 CFR mandates that pump rooms on tank vessels handling grades A, B, or C liquid cargoes must feature mechanical exhaust ventilation capable of achieving a complete change of air every 3 minutes to prevent hazardous vapor accumulations.