Question 1003 Deck General

The correct answer is B) 3 minutes. According to the regulations for cargo pump rooms on tank vessels constructed in 1965 and handling grade C liquid cargo, the power ventilation system must be able to completely change the air in the cargo pump room within 3 minutes. This requirement is specified in 46 CFR 32.55-20(a), which states that the ventilation system must be capable of providing "at least 20 complete air changes per hour". The other answer choices are incorrect because 1 minute is too fast, 5 minutes is too slow, and 10 minutes is significantly too slow to meet the regulatory requirement of 3 minutes for a complete air change.