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 a wall wash test?

A A test to determine the presence of contamination on the bulkheads.

B A test to determine that the coating is fully cured.

C A test to determine the passive layer in Stainless steel tanks.

D A test to examine the thickness of epoxy coating.

Питання 2

When is it safe to clean a tank using steam?

A When it has either been inerted or cleaned and gas freed.

B After a line and bottom flush where the residues have been transferred to a slop tank.

C Before ventilation.

D It is never safe to clean a tank using steam.

Питання 3

What is the pour point?

A The lowest temperature at which a liquid will flow.

B The lowest temeprature where it is possible to remove the product by ventilation.

C The lowest temperature at which the product can be ignited.

D The lowest temperature where the product can give off vapour.

Питання 4

You are going to wash cargo tanks after unloading Heavy Fuel Oil with a pour point of 43 °C. What should be the initial washing water temperature?

A 60 °C.

B 35 °C.

C 45 °C.

D 80 °C.

Питання 5

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.

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