Seam 2 [87]

42問 • 2年前

問題一覧

At some angle of heel such as 15°, your ship's KM has increased and eventually equal to KG making your vessel's GM equal to zero. What may result when this condition occurs?

The vessel goes to neutral equilibrium

What are usually designed to slightly exceed the stability requirements, Classification society test the stability requirements.

Ships

What can cause a watercraft to become unstable and capsize.

Free surface effect mechanism

Which statement is correct that the angle of loll can only be corrected by:

Lowering the Centre of gravity

What is the main problem of the Cargo Officer in finding the position of the vessel’s stability when the position of M is readily available in the hydrostatic data in the ship’s stability booklet.

Center of Gravity

is the type of buoyancy that the object is sitting at the bottom of the body of water.

NEGATIVE BUOYANCY

What is the purpose of loadline mark and assigned freeboard?

ensure that a ship has sufficient freeboard

What is marked 50mm below the winter load line which applies to voyage above 36 degrees of latitude during the winter months?

Winter North Atlantic free board

What is the force representing the combined effect of two or more forces acting at a point.

Resultant Force

When its metacentric height is very small thus making the ship less stable, the vessel is said to be

Tender Ship

What is used to measure the ship stability at large angles of heels?

Curve of statical stability

When a ship is inclined by an external force caused by the action of the waves or wind.

Heel

This means that when a vessel is floating upright (at equilibrium) in still water, the centre of buoyancy (up-thrust) and the centre of gravity (down-thrust) will be on the same line, vertically above the keel (K).

Curve stability

What is the maximum righting lever shall occur at an angle of heel?

Not less than 30°

What means if the resistance of a boat to small changes in the difference between the vertical forces applied on its two sides.

Initial Stability

A box shaped vessel of 160 feet in length and 30 feet breath floats at a draft of 10 feet. Find her BM?

7.5 ft

What is the center of gravity of the body that act vertically downwards with a force equal to the weight of the body(ship).

“CG” is The center of gravity of the body(ship)

What equilibrium if the centre of gravity (G) of a vessel is above the metacenter (M)?

Unstable Equilibrium

A rectangular shaped vessel 200 m in length and 32 m in breadth, floats at an even keel draft of 9.0 m. The KG is 10.0 m, KB is 4.737, BM is 8.989 m. What is her GM

3.73m

What type of moment does it countered any rolling from the perpendicular in a normally laden vessel generated by the increased volume of water displaced by the hull on the lowered side.

Righting Moment

The pressure on the bottom of an object is greater than the top, in which direction the net force due to the fluid.

In Upward Buoyancy

A type of vessel that must have an LBP of between 100 and 150 m.and It must survive the flooding of any single compartment (excluding the machinery space).

Type (B-60) Vessels

What is the vertical height of G above the keel for transverse stability calculations?

It says that the buoyant force on a submerged object is equal to the force of gravity on the liquid displaced by the object.

True

Is define as the volume of enclosed spaces above the water line

Reserve Buoyancy

It is the horizontal distance between the lines of buoyancy and gravity.

What would the upsetting/capsizing moment become when ship has an angle of loll?

negative

What is calculated as fractions of the length and breadth of the vessel, and is to be placed in the area of the ship where it would cause the most damage to vessel stability.

The assumed hole

It is caused by unequal loading on either side of center line of vessel.

Angle of List

What is the condition of a ship when G is low and GM is large, large GZ fast roll:

Stiff

It involves taking all the centers of mass of objects on the vessel and then computed/calculated to identify the center of gravity of the vessel.

Intact Stability Calculation

What type of water has the most density?

At 39 °F

What is the approximation for the vessel stability at a small angle (0-15°) of heel

Metacentric Height

It is the work done in inclining a ship as in the Inclining Experiment.

Dynamical Stability

What means the distance between G and M in the metacentric system of stability.

Metacentric Height

What is the moment to return the ship to the initial position when inclined by an external force?

moment of statical stability

What function we could use as a measure of the initial stability of the vessel

What is the type of ship’s stability equilibrium that is forcibly inclined, will return to her original upright position when the inclining force is removed

Stable Equilibrium

What is the state of equilibrium a vessel when the arm GZ disappears altogether when G coincides with M.

Neutral Equilibrium

It is the number of inches by which the mean draft changes when a ship passes from salt water to fresh water, or vice-versa, when the ship is loaded to the Summer displacement.

Fresh Water Allowance (FWA)

Which of the following does not belong to the remedial actions taken to correct your vessel having an angle of loll?

Adding weight in the maindeck

What is the ship’s righting behavior when the moments will be so large as to cause the ship to return to the upright

Stiff Ship

Seam 5

Gwen Yuchen · 60問 · 2年前

Seam 5