Tanker Familiarization Cargo Handling and Operations 3

Question 1

What action must be taken before opening a cargo tank on a chemical tanker that previously held a toxic substance?

Accepted Answer

Confirm the atmosphere is safe using calibrated gas detection equipment

Answer

Before entry or opening of tanks containing toxic substances, the atmosphere must be tested with calibrated instruments to confirm safe oxygen and toxic gas levels.

Question 2

What is the function of a 'P/V valve' (pressure/vacuum valve) on a tanker cargo tank?

Accepted Answer

To automatically regulate tank pressure within safe limits during loading and discharge

Answer

P/V valves automatically open to relieve excess pressure or vacuum in cargo tanks, protecting the tank structure while minimizing vapor release during normal operations.

Question 3

On a product tanker, what is 'segregation' of cargoes primarily intended to prevent?

Accepted Answer

Contamination between incompatible or different grade cargoes

Answer

Cargo segregation prevents cross-contamination between different grades or incompatible products by maintaining separate piping systems, pumps, and tanks for each cargo.

Question 4

During a ship-to-ship (STS) transfer, what is the critical first step before connecting cargo hoses?

Accepted Answer

Conduct a pre-transfer conference and complete a safety checklist

Answer

A pre-transfer conference ensures both vessels' officers agree on transfer rates, emergency procedures, communication signals, and safety arrangements before any connections are made.

Question 5

What is the purpose of a 'drip tray' at the cargo manifold on a tanker?

Accepted Answer

To contain small spills and drips to prevent overboard pollution

Answer

Drip trays at manifolds capture small spills, leaks, or drips from connections, preventing hydrocarbon contamination of the sea and ensuring compliance with pollution prevention regulations.

Tanker Familiarization Practice Test

Tanker Familiarization Practice Test

Tanker Familiarization Cargo Handling and Operations 3