Oil Tanker Competence

Tank Cleaning – Principles & Operations

A test covering the fundamentals of cargo tank cleaning using tank cleaning machines. It includes cleaning principles, temperature regimes, pressure, the use of cleaning chemicals, cleanliness standards, and basic safety requirements. Suitable for cadets and junior officers.

Питань 18

Час 9 min

Мова Англійська

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Питання 1

When oil is flowing through a steel pipe both will be electrostatically charged in such a way that:

A One will be negatively charged, the other will be positively charged.

B Both will be negatively charged.

C Both will be positively charged.

D None of them will be charged.

Питання 2

What will happen with the flammable range if the oxygen content is lowered?

A The range will become more narrow.

B Nothing will happen.

C The flammable range is not oxygen dependent.

D The range will become wider.

Питання 3

When alkalis and vegetable oil are mixed they form:

A Soap.

B Alcohol.

C Butter.

D Organic Acids.

Питання 4

What will be the normal pressure when cleaning with dual nozzle tank cleaning machines?

A 8-10 bar.

B 4-6 bar.

C 6-8 bar.

D 10-12 bar.

Питання 5

What is the most common reason for performing crude oil wash?

A To prevent cargo sludge building up.

B To avoid contamination of the next cargo.

C To comply with the Volatile Organic Compound Management Plan.

D To make it easier to ventilate the tank.

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