Tanker Familiarization Tanker Systems and Equipment 5

Question 1

What is the function of a 'spill valve' (also called overflow valve) in a tanker cargo system?

Accepted Answer

To automatically divert overflow back to a slop tank during loading

Answer

A spill valve automatically redirects cargo to the slop tank if the receiving tank reaches its maximum level, preventing deck spills.

Question 2

What is the recommended oxygen content (by volume) inside a cargo tank declared 'inerted'?

Accepted Answer

Less than 11%

Answer

IMO guidelines require the oxygen content in an inerted tank to be maintained below 8% (with a target of 5% or less for crude oil tankers), but the SOLAS threshold is below 8%.

Question 3

Which document lists the physical and chemical properties, hazards, and emergency procedures for a specific liquid cargo?

Accepted Answer

Safety Data Sheet (SDS / MSDS)

Answer

The Safety Data Sheet (SDS, formerly MSDS) provides comprehensive hazard information, safe handling procedures, and emergency response guidance for each cargo.

Question 4

A tanker crew notices the inert gas blower fan vibrating abnormally. What is the most appropriate immediate action?

Accepted Answer

Shut down the blower and investigate before resuming cargo operations

Answer

Abnormal vibration indicates a mechanical fault that could lead to blower failure; cargo operations relying on the IGS must stop until the blower is inspected and repaired.

Question 5

What is the purpose of a 'fixed gas detection system' on a tanker?

Accepted Answer

To continuously monitor cargo tank and pump room atmospheres for flammable or toxic gases

Answer

Fixed gas detection systems provide continuous automated monitoring and alarming of flammable and toxic gas concentrations throughout critical spaces.

Tanker Familiarization Practice Test

Tanker Familiarization Practice Test

Tanker Familiarization Tanker Systems and Equipment 5