Seaworthiness of Ships. Test 3

What is the 'Breadth Extreme?'

The mean of the breadth at # 1 hatch and the breadth at the aftermost hatch.
The maximum breadth measured from inside the plating.
The maximum breadth measured from outside the shell plating P to S.
The maximum breadth measured from the inside plating at the bottom of the centremost hatch.

What is 'the moment of a couple?'

It is the product of one of the forces forming the couple, and the lever of the couple.
It is the righting lever that gives a rolling vessel the ability to return to her initial position, after having been forcibly heeled.
It is the perpendicular distance between the forces forming the couple.
It is the combined strength of the two forces forming the couple.

What is the 'Range of Stability' on a statical stability curve?

What does the diagram show, and what does it mean?

A mould of a ship inside in a block, which is used for modeling purposes in a shipyard.
The waterplane coefficient, which is the ratio between the waterplane area and the area of the circumscribing rectangle .
A stability model, which is used when calculating GM and other pertinent information.
The block coefficient of fineness, which is the ratio between the underwater volume, and volume of circumscribing block.

What is a 'Moment', in terms of stability?

What causes a 'Free Surface Effect?'

What is the 'formula ' for calculating the righting moment of a ship?

Review Answers