Trim, Stability, Stress. Test 4

What does 'Permeability' mean?

The process of making a compartment non - porous.
To make a compartment watertight .
The flooding of the engine room compartment.
The relationship between the volume of a compartment and the volume available for water if bilged.

The diagram shows loadline marks. How is the distance between S and T calculated?

What are 'Cross Curves of Stability' used for onboard a ship?

What is the 'Centre of Pressure?'

It is the part that is least likely to give way to external pressure.
It is the point where the total thrust of the pressure could be considered to act.
It is the pressure in the centre of a specific tank.
It is the pressure at the Centre of Flotation.

What effect does 'Freeboard' have on a vessel's dynamical stability?

It does not have any effect on dynamical stability.
If freeboard is greater, then the dynamical stability is correspondingly reduced.
Freeboard and dynamical stability are not related in any way.
As freeboard increases, the range of stability also increases, and this in turn leads to greater dynamical stability.

What is the BM for a box-shaped vessel in terms of breadth and draught?

What is a 'Prismatic co-efficient?'

How would you increase the KG of a ship, loaded with a timber deck cargo, that has become 'unstable?'

By filling the small divided double bottom tanks on the lower side, whilst jettisoning the deck cargo from the higher side.
By jettisoning the entire deck cargo of timber.
By filling all wing ballast tanks.
By completely emptying all partly filled double bottom tanks.

What are 'Hydrostatic Curves' used for in ship calculations?

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