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

What is White Water Standard?

A A cleanliness Standard where the tanks are cleaned so they are visually clean, dry and odour free.

B A cleaning chemical especially for Stainless Steel Tanks.

C A tank cleaning method used to clean tanks in order to carry drinking water.

D Sea Water treated with chemicals to remove chlorides.

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

The most common reason for tank cleaning is:

A Prepare cargo tanks for carriage of the next cargo.

B Facilitate gas freeing – tank entry.

C Prevent build-up of cargo residues.

D To protect the environment.

Питання 4

Chemical reaction is supported by:

A Heat.

B Low dew point.

C The presence of hydrocarbons.

D The presence of oxygen.

Питання 5

Why should washing in stainless steel tanks with salt water be avoided?

A The presence of chloride ions in salt water may cause corrosion.

B Salt water discolours stainless steel.

C Stainless steel tanks can be washed with salt water without any problems.

D The relative density of salt water is too high.

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