Tanker Safety Systems Flashcards
7 cards from real Tanker Familiarization practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Tanker Safety Systems flashcards as text
What is the primary purpose of an inert gas system on a tanker?
Answer: To prevent flammable mixtures from forming in cargo tanks
Inert gas systems replace oxygen in cargo tanks with non-flammable gas (typically flue gas or nitrogen) to prevent explosive mixtures from forming.
Which atmosphere condition in a cargo tank is considered the safest when inert gas is being used?
Answer: Oxygen content below 8% by volume
Maintaining oxygen content below 8% by volume ensures the atmosphere cannot support combustion, keeping the tank in a safe inert condition.
What does a high-level alarm on a cargo tank indicate?
Answer: The tank is approaching its maximum safe filling capacity
A high-level alarm warns crew that the cargo level is nearing the tank's maximum allowable capacity to prevent overflow and structural damage.
What is the function of a pressure/vacuum (P/V) valve on a tanker cargo tank?
Answer: To prevent excessive pressure buildup or dangerous vacuum from developing
P/V valves automatically open to relieve excess pressure or vacuum, protecting the tank structure from damage due to pressure differentials.
Emergency Shutdown (ESD) systems on tankers are designed to:
Answer: Rapidly stop cargo operations in the event of an emergency
ESD systems are critical safety devices that quickly halt all cargo transfer operations when triggered by a detected emergency condition.
A fixed gas detection system on a tanker continuously monitors for:
Answer: Presence of flammable or toxic vapors in key areas
Fixed gas detection systems provide continuous monitoring of flammable and toxic gas concentrations in pump rooms, cargo areas, and other critical locations.
What should crew members do FIRST when a gas detector alarm sounds in the pump room?
Answer: Stop operations, ventilate the space, and investigate from a safe location
When a gas alarm sounds, crew must immediately stop operations and assess the situation safely before any entry, as the space may be immediately dangerous.