SHIP CONSTRUCTION (Trim and Stability) Quiz

*IMPORTANT*
It is highly recommended that you master this quiz with a final test score of 100%, prior to scheduling your final exam.
*You will have a better test day outcome if you do this*

1 / 15

Category: MASTERS – SHIP CONSTRUCTION – Trim and Stability

The definition of transverse metacenter is:

a) The distance between the actual center of gravity and the maximum center of gravity that will still allow positive stability.

b) The point to which G may rise and still permit the vessel to possess positive stability.

c) The sum of the center of buoyancy and the center of gravity.

d) The transverse shift of the center of buoyancy as a vessel rolls.

2 / 15

Category: MASTERS – SHIP CONSTRUCTION – Trim and Stability

Which of the following statements is true regarding a stiff vessel?

a) She will have a large metacentric height.

b) Her period of roll will be large due to her large metacentric height.

c) She will have an unusually high center of gravity.

d) She will pitch heavily.

3 / 15

Category: MASTERS – SHIP CONSTRUCTION – Trim and Stability

A stiff vessel would have which of the following?

a) It has a small GM.

b) It pitches heavily.

c) It has an unusually high center of gravity.

d) Its period of roll is short.

4 / 15

Category: MASTERS – SHIP CONSTRUCTION – Trim and Stability

The condition of a vessel that rolls slowly and sluggishly in a seaway would indicate that the vessel:

a) Has off center weights.

b) Is taking on water.

c) Has a greater draft forward than aft.

d) Has poor stability.

5 / 15

Category: MASTERS – SHIP CONSTRUCTION – Trim and Stability

The detrimental effect of free surface, as the displacement of a vessel increases, likely:

a) Increases.

b) Decreases.

c) Remains the same.

d) May increase or decrease depending on the fineness of the vessel’s form.

6 / 15

Category: MASTERS – SHIP CONSTRUCTION – Trim and Stability

Free surface is not affected by the:

a) Width of the tank.

b) Length of the tank.

c) Registered tonnage.

d) Specific gravity of the liquid in the tank.

7 / 15

Category: MASTERS – SHIP CONSTRUCTION – Trim and Stability

A tender ship would have which of the following?

a) It has a large GM.

b) Its period of roll is long.

c) It has a very low center of gravity.

d) It has a good transverse stability.

8 / 15

Category: MASTERS – SHIP CONSTRUCTION – Trim and Stability

Metacentric height may be considered an indication of a vessel’s stability:

a) For all angles of inclination

b) For large angles of inclination

c) For small angles of inclination

d) In no case

9 / 15

Category: MASTERS – SHIP CONSTRUCTION – Trim and Stability

What is Metacentric height a measure of?

a) Initial stability only.

b) Stability through all angles.

c) Maximum righting arm.

d) All of the above.

10 / 15

Category: MASTERS – SHIP CONSTRUCTION – Trim and Stability

The distance between the line of force through B and the line of force G when a vessel has positive stability is called:

a) Metacentric height.

b) Righting arm.

c) Righting moment.

d) Metacentric radius.

11 / 15

Category: MASTERS – SHIP CONSTRUCTION – Trim and Stability

How can the initial stability of a vessel be improved?

a) Removing loose water.

b) Adding weight low in the vessel.

c) Closing cross-over valves between partly filled double bottom tanks.

d) Any of the above.

12 / 15

Category: MASTERS – SHIP CONSTRUCTION – Trim and Stability

What is the point to which G may rise and still permit the vessel to have positive stability called?

a) Righting point.

b) Metacenter.

c) Metacentric radius.

d) Tipping center.

13 / 15

Category: MASTERS – SHIP CONSTRUCTION – Trim and Stability

The weight of the cargo in a vessel referred to as tender would be:

a) Evenly distributed vertically and the double bottoms are full.

b) Concentrated low and the double bottoms are empty.

c) Concentrated low and the double bottoms are full.

d) Concentrated high and the double bottoms are empty.

14 / 15

Category: MASTERS – SHIP CONSTRUCTION – Trim and Stability

Which of the following statements is true in regard to the force of buoyancy?

a) It is equal to the force of gravity.

b) It is an upward force.

c) It is an important force to determine stability.

d) All of the above are true.

15 / 15

Category: MASTERS – SHIP CONSTRUCTION – Trim and Stability

To maintain a stable vessel you should:

a) Keep the center of gravity below the metacenter.

b) Keep the center of gravity above the metacenter.

c) Weight should be placed above the center of gravity.

d) Weight should be taken from below the center of gravity.

Your score is

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